Although I agree with Ash in that retarding timing increases EGT's at the expense of cylinder temps, I think Ash's delivery of this info sucks. I think Ash is very innovative and brings lots of useful info to the forum, but he sometimes struggles to deliver this info without pissing everyone off.
To an outsider, this Z1 owns all attitude makes Z1 look bad (imho). Quit tooting your own horn. Let your customers do the horn tooting for you and you will be better off.