i don't know about any of that...lol
But bringing it over to 131 is a good idea from the standpoint of its an elite racing surface..wide, all concrete, smooth, safe, and huge shutdown.... much better option to sort a car out than Lapeer is, for sure.
As you get more comfy driving it, the car will become much easier to get from A to B
Btw... i shift mine by ear, and still get it to run the number, no way i can shift it by the tach...and i have been meaning to get a shift light..but haven't yet.
Its kinda old school, but I am pretty positive i shift it pretty identically each lap. Cars really talk to you if you listen...lol... but i do need to buy a shift light!