figured out why it felt so fast on 4S. I accidentally put in the 1Y, not the 2Y.
Guess it would help if I knew how to read before I put a motor into my trucks.
Sigh, have to bust out the soldering iron again. Will leave this for a later date I think, run the 1Y for now on 4S. At least until it warms up a little, then I'll try the 2Y. Thanks to the castle link KV output to telling me I'm an idiot, haha.