Originally Posted by Shadows

I have tried the delrin version and is very good. no sign of wear yet. It comes with a little higher tolerance, so it does require a short break-in period. Took me two 5min races to wear it in. Now its silky smooth and no slop.

http://thetoyz.com/cart/thetoyz_cate...GY&action=list

The alu version is now available though major hobby retailers, but have not tried it as yet. Happy with the delrin for now, but the weight factor might come in handy with an alu slider if you need to add weight to the front end..