Thank-you, George, for a clear and elegant explanation of my next steps. I'll print them off and follow them "religiously"!

I take it that under ideal circumstances, peak compression setting would also work for cold starts. Failing that, would I then revert to lower compression for starting and then after a short run time, bring it up to peak? I'm also taking your other advice and am dropping the fuel tank a quarter inch. I think you're on to something there given a bit of fuel pooling I noticed just inside the intake.

Dave Mo