I have a prototype steel flywheel and while it works really well in my stock engines the modded P5 engine needs a different animal for slick track conditions. I didnt get to try more weights in the steel flywheel but I did try the carbon like shoes and lighter springs it just was not enough of a change for what I needed. What I'm trying to say here is the M2C clutch is great, I use it in my truggy and love it, even on this track when it was slick with my Clockwork bonito but the buggy and P5 was a whole different ball game. Next test will be more weights on the steel flywheel but I wont get to run again until it gets warmer out.