It would be sorta stupid I suppose. I machined a Delrin bushing once, worked great but as a cush drive it would be pretty ridged . They call it a cush drive for a reason, and make it out of rubber for the same.

2005 Model . Two Fast Eddy stickers , a bell and a clock . She's Lola . She tinkles and keeps time . http://s649.photobucket.com/albums/uu211/britbike05/