I'm using SRAM X.O with a Monkeylite SL bar and when I had the bar cut down to make it more narrow, we had to cut the grips too- no big deal. The grips are fit well enough so I haven't had any problems with the ulnar nerve area either.

As far as the Damselfy vs. Callisto saddle, I like the Callisto better. Tried both and the Callisto is more comfortable, especially when you have to scoot forward for those techy climbs.

Good Luck with your stuff!
Kristina