I run the new "a-series" Ninja MR.21 motor in my buggy and intend to use 30% Nitro. I broke it in with the stock shims (2-.3mm shims) but am wondering if I need to take them out and add the 2 that it came with to raise compression for the higher nitro content fuel. Or do I add the 2 .1mm shims to the stock set that are already on there to lower compression? I'm confused...

Basically- How many and how thick of total shims do I need to run if running 30% Nitro?

Sorry if you already covered this, but I couldn't find the info I was looking for. Thanks for any help you can give.