Just got my Ringside catalog in the mail today and noticed they have a Rolling Thunder - like apparatus for forearm development. At $9.99, its cheaper than buying PVC pipe, epoxy, and cording to make my own. Anyone have it, and if so what is the diameter on it? Is it hollow all the way through so you can hang it on a racked barbell? It is a helluva lot cheaper than the one sold on Ironmind, which is $35 for a 2" diameter roller.