That sysex file changes the stock setting on the MiniT if you have a good 1V or 4V source and you know how to deal with a multimeter. If you use it my values above won’t work anymore but you’ll still have to use the A4/AK calibration procedure for tuning. So the benefit is questionable.

Just tuning it right from the A4/AK CV settings is well documented and pretty straight forward.