Well I am using a Robinson Racing Pinion and its slipper, the one that came on teh robinson.
I got the Robinson when I first got into RC..IT seemed smart..metal is stronger right.. That was my thinking.
http://www.robinsonracing.com/catalog/hpi.html
the 7052 was what I got.
on the back of the pinion it uses the same slipper pads as stock and sandwiches it onto the stock plate. I have 3 HPI standard plastic pinions. I will try this tomorrow. Also I wnet and got a slipper from a traxxas 2.5 and modded it to fit behind the metal robinson spur. I now actually have a pad on the tranny side then a steel plate, then 2 pieces of adhesive 150 grit sandpaper one on the plate and the other on the steel plate that sits against the robinson spur which has the stock slipper pad. 2 stock slipper pads with 2 steel plates that have 150 grit adhesive between them. It'll probably explode....
Then I'll put the stock plastic spur on and try that.