would it be possible to get lonnger shaft ball joints at
an auto store ? to give you that littlwe extra ajustment needed
my asr arms had the same exact problem as i also used shee spindles except my arms use hein joints instead of ball joints for me to ge a zero reading i had to have the heims screwed to far out . ideally u want 3/4 of the threaded area on a heim joint or threaded ball joint for that matter screwed into the arm. mine were only in a lil less than 1/2 the threaded area so i had asr make me a new set of upper arms that were 1/2 inch longer
did asr charge you extra???If they didn't thats a pretty good service for sure.
i see nothing wrong with that chamber, ideally you want 2-3 degrees of positive chamber (thats what ive always ran)
the more zero the chamber the more the tires want to roll and even make the quad tippy