Yup, I just finished it and everything you said is spot on. I also trimmed the trigger where it needed to be trimmed to fit the front of the grip frame instead of opening up the hole for the trigger but in my case the bottom of the trigger had enough clearance from the trigger guard.I experienced the same thing, the trigger will need some length trimming, and the grip frame will need to be opened up,,, OR ,,,
I trimmed the trigger where it needs to fit at the front of the grip frame.
When you pull the standard trigger put it side by side with the Bisley trigger, it will make sense then.
Me personally did this in the second gun from the top, a 45 Colt Vaquero, if you study my picture you can definitely see the "extra" curve of the Bisley trigger.
Would I do it again, NO,,,
I do like to thin, ( knife blade) the triggers and cut most of the fat off the back of the blade. IMO it does look sleeker but no added performance.
I'd think that anyone with large fingers wouldn't like it because the curve is a bit more than is needed. Luckily it works OK for most who have it.I opened up the slot in the frame since I have my original grip frame stored away. I eventually put the standard trigger back in as I never got the Bisley trigger to feel like I wanted it to.
I wanted a stainless trigger which I already had and rather than spend the buckazoids I decided to use what was in house.I did the swap for looks anyway.