One I personally think I still use is Dale Mathis, but they don't sell tone sets.To just say "can anyone make my 4X sound better" is EXTREMELY broad. What sounds good to you may not be what I consider good.
My suggestion... the fastest and easiest way to make any 8X or 4X sound better is to reset it to factory and install the Richard Noel sets.
Once installed, you can use the information in there to see how Richard Noel does it and from there learn to make your own changes.