Before mine burnt on my exhaust I had the line pressure at 10% and delay on full or close to it 90%? Make sure you secure it well or you may burn yours too. Once you get it set right you won't need to change again so in cab is not necessary. The only time I messed with it was when racing 1/4 mile at the track I would up the line pressure to maybe 20-30%

The higher you set the line pressure the harder the downshifts will be but it will shift faster on upshifts... adjust until it all runs smooth enough for you.

If you decide to sell, I would like it. I loved the feel of the shifts once you had it set right.

Not sure why but I had an IM tech make me take it off once to pass inspection FYI