Originally Posted by kitracer
I have been using 0.3mm head shim down from 0.5mm( sorry no clearance.. too lazy to buy a solidering iron

) for 25% Nitro.
I finally manage to measure the head clearence
25% nitro, 0.52 head clearance (0.3mm head shim)
Air temp 20 C, 6m above sea level, 80% humidity.
Will see how my power up against Shimo's and Team Kyosho this weekend.