Did a quick air test in my work shop with the same coil I always had that has lots of emi so coil is running much better than it was new. Disc was set up towards foil. Yes usually do raw air test with no discrimination but this time was just a quick test.
Interesting that there was variaition on machines like that. Maybe the quality of components used was the reason. Maybe sloppy soldering and cross talk between components or evey something as simple as poor tuning of the unit ie gb on fixed gb units.
Tesoro circuit designs are incredible but build quality of the machines was not top notch.
I have another 8x9 I will cross check with along with a Vaquero that has an 8x9 my buddy just bought. Be interesting how the 3 coils compare. Hopefully the other 2 are on par, don't want to be taking all these coils apart to fix lol.