These things are frustrating and I sympathize, but what if the only way to solve the problem would be to have the faders redesigned? That's not practical if they didn't sell very many HUIs.
There is an alternative on the horizon, by the way: CM Automation is coming out with a $1000 motorized control surface, sort of a baby HUI. No touch-sensitive faders, but the important features (i.e. faders) are there.
www.cmautomation.com