I know that many of you have installed the Kuryakyn ISO Grips on your 900s and I'm considering trying a set myself. I've been experiencing numbness in my hands lately after even short rides. I'm not aware of much vibration but I'm assuming that's what's causing the numbness. My question is should I install them myself or would it be better to take to a dealer for installation? I've read the instruction sheet online and it looks like the Kawasaki throttle-side grip install is different than a standard install. Any suggestions or comments? Also I see that the sell add-on end-weights for the grips to further reduce vibration. Is that a good idea?