I can definitely provide more info - the two main costs were:
- Audit - ~$50k
- Development - ~2 FTE equivalents, for 3 months
These changes included:
- Extensive edits of the
Comptroller.sol
contract to make room for the new functionality. - Adding vesting, the grant functions and other core functionality
- Responding to the audit and development community feedback
You can see the details in the PR’s linked above.