Thats what i was thinking....the brand of spring doesnt matter....i still get proper ride height. I still get all the extension and compression i did before. Shouldnt matter whether i use losi springs or traxxas springs as long as they dont interfere with the shocks range of motion who cares? Once i get balance i can worry about having matching brand names. If i figure out the spring rate of the Caster springs i can find some thing thats the same from losi later on down the road and all ill have to worry about is ride height since the casters are a bit taller.