I did call KKM and spoke with Kevin, the owner IIRC, and he confirmed his barrel will definitely eliminate the bulge and improve accuracy significantly. I'm trying to decide if it makes sense to sell the G20 & save the $$ on the KKM then up the cash for the Limited.
I hope some Limited owners will chime in. BTW: I do not shoot any competition at this time. I was real impressed when I held my friends Limited 40 S&W. That's what got this all started!