I absolutely love my TLR 22 4.0. I just got back into racing last fall after a long break and everything is so much better than it used to be that's for sure. I'm a fast and aggressive driver and I make a decent amount of mistakes but I don't break many parts. Learning to be fast again means you hit stuff fast if you make a mistake haha.

The only durability problem I had was the front ball stud mount, I run an aluminum one now and have no issues any more. Just the occasional front hub insert (wheel bearing rides in an adjustable plastic sleeve that breaks a flange off, I really need to order the aluminum piece, its also super cheap) rear wheel bearing and an arm here and there. I go through more front and rear wings than any chassis part. Front is from mostly contact with other cars.....

I've ran the b6 and b6.1 occasionally and I just find them to be less consistent and feel looser. The TLR just seems to make more grip and is easier to drive consistently faster. Med/High bite clay is also the 4.0s best environment. They can be setup to run on all surfaces but that's the easiest. Only thing to avoid is the 4.0 SR, the latest and greatest 17.5 motors can easily break the aluminum axles and plastic diff out drives. Just get the regular 4.0 and then you don't have to worry about it. If you end up getting one PM me and I can get you a setup sheet.

~Alex