I have had my Earthquake 8e since Feb 2010. It was a blast but now after 100 min of run time I can't keep my ring gears, front and rear from coming apart. Am replaceing full diffs with bulkhead been thru 3 so far. And I am just on pavement and back fields. No jumping or track runs yet would like to but am tired of putting diffs in. Have shimmed the diffs or pinions but Redcat has told me not to shim the pinion to much but the ring gear closer to the pinion??? Anyone? If I can't figure this out I may end up converting to a Backdraft 8e Buggie.