Hello, and welcome. I can't help you with your question about twist, Dusty or Greyhawk will be along, they are two of the more knowledgeable on that sort of thing. I would like to add that before you go whacking off a chunk of stock, have a gander at gunstock.com. they have an option that can make your curved buttstock to shotgun buttstock. I have 2 of them and love them. Adds a bit of lop, which I needed anyway. And the covers are awesome also, in my humble opinion. Check it out.