i did shim mine with a rubber washer under neath my adjusters are half way up and they are plenty high from 25 feet back....4 ft high would be in peoples eyes the cutoff shouldnt end up higher than the proj itself....mine go straight out and i can see perfect.....ill try to take pics tonight.
My retro is perfect for what i needed: more output and highbeams that are functional....im not gonna go make them perfectly straight to gain 1 ft or 2 horizontally lol thats a waste.....its def a tedious job on the border of pain in the ass lol i wouldnt do retros for anyone period because i could just see perfectionists complaining about something that would be impossible to fix....people need to remember these werent ment to be proj so its gonna take alot of work and not gonna be 100% perfect no matter what.