I am looking for info on which brand and what dia. of 300M torsion bars to use in the my new 9 car. It's a two seat chassis. Also need info on where to buy them, i.e., Kartek, McKenzies, or ?, etc. I've been told that SAW has problems with theirs, or is it just their non-300M bars. Looking for what works. Thanks, Mike Hinson, Bakersfield, CA.