Originally Posted by xtrememadness

you need to remove about .5 mm off of each side. i put mine in a lathe and just removed some material. you can also do it with a dremel. you also need to dremel the dogbones a little or drill the outdrive bigger. i chose to dremel the dogbone, it took 5 min per side. i run the spec r diff in mine with no issues. they say the yokomo is better but its hard to get and even harder to get rebuild parts. spec r is making one for the tc6 due out in about a month and associated is working on there own version