I fixed my P232 grips as well.
You do not want to see what they look like on the inside. I was dremeling anywhere and everywhere I thought was preventing me from moving them up on the grip.
I'll NEVER buy from him again. His lack of response to e-mail is unacceptable. I'm sorry, but if you run a business like that, when you get home from the shop, you answer e-mails until you've answered them all. If that means staying until 2AM so be it. But you can't treat customers that way.