Another timing curve question

OK, there is a .050 difference in position... although that's not so obvious at a glance to the inexperienced carb tweaker :p

I've been thinking about high rpm retard due to delays in the electronics (often but incompletely referred to as "slew rate"). My engine will briefly and occasionally see up to 7000 rpm. Do I want to allow the slow advance (from the heavy spring) to go higher than 34... perhaps 38 mechanical , since the actual timing will be a few degrees less when it actually fires at high rpm?

(I won't be able to actually measure that unless I want to rev that high in neutral, AND I have no way of knowing how much my Craftsman timing light may be retarding too. So I'd have to measure the 34 at around 4000 rpm and estimate by slot length)...