I donno, I posted as a new topic so it wouldn't get over looked so easy in the 8ight truggy thread,
You can do this with out buying any parts from anyone, just find 2 clicky pens and something that can cut the springs,
Can't wait to try it, gonna be a 3 day race event end of this month getting my truck ready for it
http://www.eastcoastrcclub.com/index.html