The other thing Doug's fix does is in effect instantly raise the height of the handrests; something I've been muttering about trying for ages, so I shall give it a go (even with comparatively healthy hands.)
Yes... originally tried it because I have relatively large hands with long fingers that don't work well all crumpled up...it gives me up to 3/4 inch better lift, and the insulation comes in different thicknesses and even different materials with differing cushioning. The relief on the numbness problem was a happy side effect of the cushioned "lifts"...plus they're removable when it comes time to sell, no permanent alterations required.
Hope it helps others! Keep squeezing!