I've got similar issues. If you listen to guys like Carl Saunders who posts his opinions on the subject on his website, you'll be doing yourself a favor down the road. If you listen to a Bobby Findley, as long as you can develop compression in your oral cavity and there's room for the air to get out, it matters little where your jaw is; his brother plays with an overbite and has unbelievable range. Phil Smith of the NY Phil seems to play with his horn at a 45 degree downward angle and he sounds unbelievable. Then there's the Freddie Hubbards with the horn up in the air, the Chris Bottis with the mpc up near his nose.
At the end of the day, you've got to go with a combination of gut and good sense. I went through a more radical emb change than I needed and it set me back. I'm back, but it was unwarranted. As they said on Hill Street Blues, "Be careful out there."
Ed Mann
MySpace.com - Ed - 51 - Male - LA, California - www.myspace.com/jazzlips