Re: Fixed Bridge (Kahler 3300) on an RG ?
I know what it's like having a guitar that you really like, but it not being quite what you need. I was actually in that exact situation once. I hated the Floyd in my RG520. Tried blocking it, still wasn't happy. I ended up making a completely new body for it. You might think about contacting one of the guys that does replacement Ibanez bodies, as the price for filling in the trem cavity and refinishing the body may be starting to approach to cost of a totally new body. Also, the refinish job is a bit of a tricky one, as it's difficult to ensure there is no visible line around the fill.
Anyway, I'm going to revise my earlier statement and say "go for it," provided you realize that you're going to be spending a decent chunk of change of a guitar that's not really worth a whole lot. The Kahler seems like a nice bridge, and the description on their website makes it seem like it would work. There are far cheaper bridges that will work just as well, however.