I have, or at least my son did it the way I suggested he do it. He ran it in at a full 4 stroke full throttle for a tank or so then started slowly leaning it out until it was almost peaked after a few more tanks. The fuel was true FAI so nothing like normal car fuels. After it was run in we did a slight mod to the cylinder head and now (still with the FAI fuel) it's at least as fast as other identical cars using 25% nitro. The main difference is he gets about 8:30 per tank while the others get about 6 minutes. So far he's only run about 5 litres through it but it's still as good as new.

For those into cars as well, it's a Mach .28 in a Hyper 7. Just for interest's sake, I analysed a sound track of his engine and on a very short straight it was turning 29,400.