hi i have 2 scs 1 lumbar 1 cervical. the lumbar one is a stage 4 abs and it is amazing (it takes very little alteration to achieve amazing results). the stage 4 was attached to my nerve roots which makes the results far more supirior (imho). my cervical is a stage 2 abs (not sure they even use them any more. it is directly in my prinal column and the results havent been everything i hoped for. i am going to talk to my doc about apgrading my unit...not sure if it is possible but something needs to improve
if you have any scs questions about the procedure or how the remote works let me know