Thanks Psycho.
Storm, Niftech makes the best axel by far, it uses 12 diff balls insted of 6 so you dont have to tighten it as much to make it not slip which makes it smoother, but watch out if you call them up, he will try to convince you that all the top drivers use his stuff and anyone who wants to win uses Niftech. Nice stuff but the guy is full of crap, he probably used to sell used cars.
The CRC carpet knife and the speedmerchant are very similar, I think on the Speedmerchant you can move the battery back and forth.