Very new to the rc game. I just recently bought the b4.1 worlds kit and so far loving it. My ? Is what are the reasons to changing to the losi springs? Also is there a way to compare motors that are rated only in kv to ones in turns I know there is a lot of variables just curious if there's a way to get close I'm running a 5800kv out of my sc for the time being. Thanks in advance!!!!