Hello. I bought my first ECX the other day from my lhs. I got the ECX Amp DB and im pretty impressed. Its nice and seems to be pretty durable. I upgraded to an 85a and 4000 firma Spektrum combo and was wanting to go down a little on spur gear but can't find anything that fits over the shaft. I have a bunch of 48p spur gears for Team Associated and Kimbrough but none of them fit. Thanks in advance or any help!