diff --git a/contracts/contracts/coordination/Coordinator.sol b/contracts/contracts/coordination/Coordinator.sol
index e58337a7..2672fede 100644
--- a/contracts/contracts/coordination/Coordinator.sol
+++ b/contracts/contracts/coordination/Coordinator.sol
@@ -138,8 +138,43 @@ contract Coordinator is Initializable, AccessControlDefaultAdminRulesUpgradeable
         }
     }
 
-    function rituals(uint32 ritualId) public view returns (Ritual memory) {
-        return storageRitual(ritualId);
+    function rituals(
+        uint256 ritualId // uint256 for backward compatibility
+    )
+        external
+        view
+        returns (
+            address initiator,
+            uint32 initTimestamp,
+            uint32 endTimestamp,
+            uint16 totalTranscripts,
+            uint16 totalAggregations,
+            //
+            address authority,
+            uint16 dkgSize,
+            uint16 threshold,
+            bool aggregationMismatch,
+            //
+            IEncryptionAuthorizer accessController,
+            BLS12381.G1Point memory publicKey,
+            bytes memory aggregatedTranscript,
+            IFeeModel feeModel
+        )
+    {
+        Ritual storage ritual = storageRitual(uint32(ritualId));
+        initiator = ritual.initiator;
+        initTimestamp = ritual.initTimestamp;
+        endTimestamp = ritual.endTimestamp;
+        totalTranscripts = ritual.totalTranscripts;
+        totalAggregations = ritual.totalAggregations;
+        authority = ritual.authority;
+        dkgSize = ritual.dkgSize;
+        threshold = ritual.threshold;
+        aggregationMismatch = ritual.aggregationMismatch;
+        accessController = ritual.accessController;
+        publicKey = ritual.publicKey;
+        aggregatedTranscript = ritual.aggregatedTranscript;
+        feeModel = ritual.feeModel;
     }
 
     // for backward compatibility
@@ -152,7 +187,7 @@ contract Coordinator is Initializable, AccessControlDefaultAdminRulesUpgradeable
     }
 
     function getInitiator(uint32 ritualId) external view returns (address) {
-        return rituals(ritualId).initiator;
+        return storageRitual(ritualId).initiator;
     }
 
     function getTimestamps(
@@ -377,7 +412,7 @@ contract Coordinator is Initializable, AccessControlDefaultAdminRulesUpgradeable
     }
 
     function getAuthority(uint32 ritualId) external view returns (address) {
-        return rituals(ritualId).authority;
+        return storageRitual(ritualId).authority;
     }
 
     function postAggregation(
diff --git a/deployment/artifacts/lynx.json b/deployment/artifacts/lynx.json
index 7d1f65d6..ddbf5bba 100644
--- a/deployment/artifacts/lynx.json
+++ b/deployment/artifacts/lynx.json
@@ -4539,6 +4539,13 @@
                     ],
                     "outputs": []
                 },
+                {
+                    "type": "function",
+                    "name": "initializeNumberOfRituals",
+                    "stateMutability": "nonpayable",
+                    "inputs": [],
+                    "outputs": []
+                },
                 {
                     "type": "function",
                     "name": "initiateRitual",
@@ -4844,7 +4851,7 @@
                     "stateMutability": "view",
                     "inputs": [
                         {
-                            "name": "",
+                            "name": "ritualId",
                             "type": "uint256",
                             "internalType": "uint256"
                         }
@@ -7054,4 +7061,4 @@
             "deployer": "0x3B42d26E19FF860bC4dEbB920DD8caA53F93c600"
         }
     }
-}
+}
\ No newline at end of file
diff --git a/deployment/params.py b/deployment/params.py
index 53826e26..e91e85e5 100644
--- a/deployment/params.py
+++ b/deployment/params.py
@@ -4,7 +4,7 @@
 from pathlib import Path
 from typing import Any, List
 
-from ape import chain, networks
+from ape import chain, networks, project
 from ape.api import AccountAPI, ReceiptAPI
 from ape.cli.choices import select_account
 from ape.contracts.base import ContractContainer, ContractInstance, ContractTransactionHandler
@@ -633,6 +633,13 @@ def _deploy_proxy(
         return contract_type_container.at(proxy_contract.address)
 
     def upgrade(self, container: ContractContainer, proxy_address, data=b"") -> ContractInstance:
+        implementation = self.deploy(container)
+        # upgrade proxy to implementation
+        return self.upgradeTo(implementation, proxy_address, data)
+
+    def upgradeTo(
+        self, implementation: ContractInstance, proxy_address, data=b""
+    ) -> ContractInstance:
         admin_slot = chain.provider.get_storage_at(address=proxy_address, slot=EIP1967_ADMIN_SLOT)
 
         if admin_slot == EMPTY_BYTES32:
@@ -645,12 +652,9 @@ def upgrade(self, container: ContractContainer, proxy_address, data=b"") -> Cont
         proxy_admin = OZ_DEPENDENCY.ProxyAdmin.at(admin_address)
         # TODO: Check that owner of proxy admin is deployer
 
-        implementation = self.deploy(container)
-        # TODO: initialize taco app implementation too
-
         self.transact(proxy_admin.upgradeAndCall, proxy_address, implementation.address, data)
 
-        wrapped_instance = container.at(proxy_address)
+        wrapped_instance = getattr(project, implementation.contract_type.name).at(proxy_address)
         return wrapped_instance
 
     def finalize(self, deployments: List[ContractInstance]) -> None:
diff --git a/scripts/lynx/upgrade_coordinator.py b/scripts/lynx/upgrade_coordinator.py
index 39161981..5ecf8704 100644
--- a/scripts/lynx/upgrade_coordinator.py
+++ b/scripts/lynx/upgrade_coordinator.py
@@ -4,10 +4,11 @@
 
 from deployment.constants import ARTIFACTS_DIR, CONSTRUCTOR_PARAMS_DIR
 from deployment.params import Deployer
-from deployment.registry import contracts_from_registry
+from deployment.registry import contracts_from_registry, merge_registries
 
 VERIFY = False
 CONSTRUCTOR_PARAMS_FILEPATH = CONSTRUCTOR_PARAMS_DIR / "lynx" / "upgrade-coordinator.yml"
+LYNX_REGISTRY = ARTIFACTS_DIR / "lynx.json"
 
 
 def main():
@@ -18,6 +19,16 @@ def main():
     deployer = Deployer.from_yaml(filepath=CONSTRUCTOR_PARAMS_FILEPATH, verify=VERIFY)
     instances = contracts_from_registry(filepath=ARTIFACTS_DIR / "lynx.json", chain_id=80002)
 
+    # `initializeNumberOfRituals` was used for the original upgrade, but should NOT be
+    #  used for subsequent upgrades of Coordinator
+    # implementation = deployer.deploy(project.Coordinator)
+    # encoded_initializer_function = implementation.initializeNumberOfRituals.encode_input()
+    # encoded_initializer_function = b""
+    # coordinator = deployer.upgradeTo(
+    #     implementation,
+    #     instances[project.Coordinator.contract_type.name].address,
+    #     encoded_initializer_function,
+    # )
     coordinator = deployer.upgrade(
         project.Coordinator, instances[project.Coordinator.contract_type.name].address
     )
@@ -27,3 +38,8 @@ def main():
     ]
 
     deployer.finalize(deployments=deployments)
+    merge_registries(
+        registry_1_filepath=LYNX_REGISTRY,
+        registry_2_filepath=deployer.registry_filepath,
+        output_filepath=LYNX_REGISTRY,
+    )
diff --git a/scripts/ritual_state_check.py b/scripts/ritual_state_check.py
index c414fd9b..c6810623 100644
--- a/scripts/ritual_state_check.py
+++ b/scripts/ritual_state_check.py
@@ -114,6 +114,7 @@ def cli(network, domain, ritual_id, realtime):
         f"\tAccessController  : "
         f"{ritual.accessController} {'(GlobalAllowList)' if isGlobalAllowList else ''}"
     )
+    print(f"\tFee Model         : {ritual.feeModel}")
     print("\tParticipants      :")
     for participant in participants:
         provider = participant.provider