Hog 2 to Hog 4

have seen a couple posts around regarding conversion from 2 to 3 but haven't seen any yet to go from 2 to 4. Shoot at the moment we'd be happy going from 2 to 3 to 4.

Or is there a way to tweak the 4 into showing pan/tilt in 0-100% like the 2 for ease of position transfers vs the neg 125 to pos 125 ect that our units are currently showing in the programmer

Thoughts please