Dave, i played with mine quite a bit on the ring, they look the same as mine mate BC/Apex, If you go to low the rear end will rub bad, i cut the sidewalls on my tyres everytime i went in to Karosell lol. It moves the spring perch mate but on the rear you can adjust the shock body height aswell but it will have the minium required distance from the base to the spring perch. I did run neg on the front but is back to Zero now, are you getting the damper extenders for the rear so you can adjust them through the parcel shelf! If you dont get them with the kit let me know, i dont need mine as i can adjust normally due to no rear seats lol