ive been trying to tune this nag1 transmission for awhile now! as i read these forums for the nag1 tuning, not much is out there in hp land. ive found some videos on this mysterious creator on what each clutch and solenoids and valve does and shows the line pressure flow in and out of the clutch packs and much more! if anyone is interested in what seems to be better than the TUNING SCHOOL info on the nag1 tuning, let me know and ill upload them.