Gotta agree with Brushie here...

Easier to just scrap the stand-off, and make a replacement. Any used-up stick-pen outer would do (or hit up the dollar store for possibilities)

Plus if you use a bit of hose, like R/C fuel tubing, you get a squashable spacer AND a shock-absorbing bushing at the same time. Though in the case of a gearbox, its probably not the best idea.

In this case, its probably easier to replace the stand-off/bushing than to take it off as close to intact as ya can.

WhiteWolf