I've got a lot of hrs on my Vendetta and run 2S lipo. Breakage probs seem to start happening when you get above 3500kv. I run stock cvds in mine and other than having to CA the drive pins into the ends of the cvds have never had a prob - I did upgrade to alum outdrives, only other thing I've needed to do. Stock gear diffs won't take the higher kv. I got over 2 yrs running stock gear diffs using a 3500 CoolRed heli motor. Caught the ball diffs at 1/2 price and made that change just cause it was too cheap not too, but could have stayed with stock diffs.

I got some of the 1st DTX cvds came out that were absolute junk and are still bummed out about how lousy those were. Modded a set of cvds using alum tbg and rc18 alum bones buy have not needed them.

I've fooled around with hyperion 5000, golden horizons 4700 motors in my Vendetta and MQs (I have a total of 4). I have a feigao 280 on my bench as my next project with a quark 33.