Took my brand new tekno out yesterday to setup and tune and the bad news is, I over shoot a pair doubles causing me to flat land which also led to the stripping of 3 teeth on my brand new supposedly revised hardened spur gear, i wasn't to fussed i just thought it was a one off and installed a brand new spur gear (also revised) and headed out again, this time i on purposely over shoot the same set of doubles, and yes stripped another brand new spur gear. The new spurs seem to wear much better than the originals, but they are clearly still very week and don't like on power flat landings. . Very dissapointed . The good news is i had a 48t Agama A8 spur gear lying around, and drilled 4 new holes in it to line up with the tekno diff housing holes, and problem solved every thing both internally and externally lined up perfectly . Now i wont have to worry about not finishing due to spur gear failure, this way also ensures you can still use all original tekno diff parts so nothing needs to be shimmed the way it would when using say a serpent or mugen center diff. Here is some photos of the new diff setup.