As per the tuning sheet, oil is stated to be changed which means you should change your oil first and then try to customize your transmission.
I always suggest you leave the tranny to be the last thing you tune, below is the way i do most praiano tunes and rarely had a mismatch:
1- Tune the suspension and brakes (nothing can affect the figures in these settings)
2-Tune LSD and additional parts
3-tune the body section parts (ballast, aero, weight options if applicable)
4-Tune power section (be sure to add them parts as stated- and compare the PP and HP when done)
5- if you need more PP/HP immediately look at the change oil tab if it states "changed" jump to GT auto and do so
6-return to settings and adjust the power limiter (check the PP/HP again to see if there is any difference, if you find any difference remember that Mr.P lapped this car as stock for miles before commencing his project)
7-Assuming there is no difference, NOW i can tune me tranny (if you did exactly as i stated it's rare that you would notice a mismatch)
8- sign the tune (optional off course -- this is that way i do it "
Praiano Tuned -- SS or CH or RX depending on the tire used -- v.1.02 or 1.03 depending on the update version for future references when PD change something or when Mr, P update the tunes")
Hope this would help everyone, taking the opportunity to thank Mr. P for the great work he is doing