Give us a Call..
That is a new one to me as well... You can give us a call and I will be happy to see if I can help over the phone.
This is Jake from TANDEMKROSS.
Did you have any issues with the sear or the sear spring when installing the bushing? I would also check the hammer pin and ensure that it is seated all the way into the frame.
We can work through the issue over the phone as well. Just give us a call.