oldhacker

I need help here. I have a 2004 bike with 3x9. I have SRAM grip shift and a Shimano front derailleur. Love it and it works great. Got a steel 29er recently and want to put 2x10 with grip shift on it. The SRAM front derailleur would just not clamp right on the frame with the required shim. A Shimano front derailleur fits fine but will a 2012 XX or XO grip shift work with the XT front derailleur? I thought I saw a blog saying they weren't compatible any more. I know there are better mechanics out there than I...