I noticed that the flywheel woodruff key is the same for a P400 as well as the P650. I was wondering if anyone had installed a Diamond G or similar offset key in their P400 and if so did it help performance? What altitude are you at? Any other performance mods? Jetting changes? I'm slightly concerned about the already high compression ratio of the later P400s and then adding 4 more degrees of ignition advance.

Thanks in advance!