Got my 1/8th scale hybrid diffs from Rc-monster and installed them last night along with my Kershaw designs center dogbone kit. Installation went smooth, only mod that i had to do was to shorten the front transmission shaft as the included front dogbone is a little bit too long to use with the hybrids. A couple minutes with my dremel fixed it right up though.
Im really impressed with the fit and finish on these things, machine work is great and the 1/8th scale diffs look tough.
Ive got about 4 sets of packs run through them and they feel great, for once im not afraid of shredding my rear diff when i get on the throttle.
anyways i would highly recommend these to anyone having issues with the stock diffs.