The Tamiya ceramic grease is not the problem at all. It is very safe for plastic. Probably non-compatable grease in those bearings I would suspect.

I purchased my Pershings bearings from these people [link=http://rcboyz.com/]RCBOYZ[/link] which they sell bearings that are not only sealed, but have the plastic safe grease in the bearing so it will not harm the plastic wheel.

Going back to the stock bushing is okay, just use the Tamiya ceramic grease. I even used it with the bearings as additional protection.


Jeff