I would really like to have a 20 gauge semi but I have a problem not getting a blister on my thumb even on my SBE. I bought my wife an M2 field 20 and wore both sides of my thumb out shooting skeet. Is it possible to widen the SBE, which I really don't even shoot with that well, and/or would it be possible on a 20 without losing the integrity of the gun. I have a 20 o/u that i love to shoot and would also like a semi for dove and teal. Another reason for the 20 is to share with my daughter and eventually let her have it if she wishes. Any ideas welcomed or a top notch gunsmith in Houston that could do the work. This would NOT be for any competitions, just hunting.