hey guys I'm a bit new to 1/12 racing, but i must say every bit of advice you guys have given me has worked awesome!!!! THANKS!!!! Now for some more questions. I run a L4 on a tight carpet track and i was wondering which spring I should use in the center shock? ( currently I am using green). I also was wondering has any one used the spring steel t bar? I have seen it on the IRS web site but dont know if there any good,or what application are they good for. Thanks again