I had to upgrade from the 2000 I used with the DVX100 to the 4000 with the HVX200. The HVX is just too heavy for the 2000 model. But since the DV Multi Rig Pro came out, I don't use my Glidecam much anymore.
I just got it for the canon XHA1 and after adjusting it with a 577 bogen quick release and using one of the weight's to raise the camera plate it works fine. As for having a arm support...I'm using a old bowling glove that has a metal bracket for wrist support so it's all good.