Thanks for your input !It is hard to say without being hands on. I just put a new set of rubber grips on the project Pre B with no issues. My own Pre B has had several sets of grips without issue. Maybe they sent you a set of bad grips that passed through quality checks! It also looks like your Pre B is cerakoted so you might check to see if the cerakote is overly built up in the nooks & crannies of the frame grip openings.