Yep, I use some of that pipe insulating foam if I need more to wrap around. I either put a wrap of electrical tape around it, or better yet, velcro. But with a bi-plane hover bar, don't you have more realestate to hang things off of?
For what it is worth, the new "entry level" Carbon (SL) Inflite sold in Europe comes with normal handle bars. Its good to see that option. Guess it would be kinda hard to implement on a Grail though.