We've been discussing the project, and after exploring solutions to the tuning, JimmyK has agreed that the smartest thing is for us is
to work with Sam and GTM for the tune. He's done it a gazillion times, it's correct and I don't have the need to keep fussing with it (This would have been the benefitr of the Haltech).
Get it right once, and then just drive it like I stole it....
I've printed the lengthy and comprehensive manuals from GTM, and the tech (Hector) is as excited as I am to get going. He's good, and meticulous.
So far, so good.
Coop