I have been testing a bunch of stuff, and one thing I would like you all to try is a different piston in the rear. Drill the piston out to 7×1.4 and I run 30wt or 450cst. Let me know in the comments what you think of it. Also, I like to run the HB Yellow springs front and rear on a lot of tracks. I still prefer the greys on slippery or bumpy tracks though. Try the piston, and the springs too if you can get a hold of them, and let me know what you think. I won’t tell you what to think.