I just installed the Apex comp trigger in my pro series 9

I brought the trigger pull down to 3 lbs 4 oz. I was hoping for just under 3 but it is still nice.

However even after I installed it I still had a "hitch" and not a smooth pull. Took me a while but what I found was. (I don't know what to call this part)
The lever directly under the ejector apparently moves when you pull the trigger and there was a burr on the sear housing itself that the lever was catching on. I disassembled the lever from the housing and filed the burr off with a fine file and polished the side of the lever that rubs against the housing and the eliminated what almost felt like a 2 stage trigger.

I still have a little creep but it is smooth