Yep, tabs are dremelled of on mine too..
Im using Corally 4200 35c.. they fit in fine, ive just put spacers under the kit posts to raise them up and used longer screws and it works a treat..
I have been running with extra weight in the car as have a few others.. 60g under each lipo and 60g down the center spine..
Simply to get the car back up to nimh weight.. I found the car seemed to work better as did others across the bumpy stuff, it keeps the back end planted and makes the suspension work..also helps the " loose " rear end withthe extra weight..
Indoor on carpet very smooth etc running the slipper " direct " you shouldnt need weight.. i ran with weight at the petit but have a few things to try since seeing Rich Crees, Shins and Butch's car going with this direct slipper set up the car has PLENTY of rear traction coming out of the corner.. This change should have cured the " loose " end.. for both indoor and outdoor low grip tracks..
I'll confirm what im saying and if it helps at the weekend..big set up changes so a busy sunday me thinks!
Cheers
Nick