So installed the new mim hammer assembly from midway. Used several parts from my spare parts bin from a 669 parts lot and a 5906 lot I bought in the past. I've managed to make a cocked and locked 5906 with a 9.2lb double action pull and according to my lyman scale an 8.4lbs single action.

The reset is even shorter than my other 3rd gens. Doesn't feel like 8lbs maybe because I used a wider trigger. Used a 439 mag release nut, and slim slide release. Haven't shot it yet since I just finished it today.

Did the polishing techniques from the 3rd gen youtube videos and the pulls in both single and double are smooth and seem to break clean.

Will load up 2 or 3rds in case I screwed something up and it goes full auto which I highly unlikely see doing.