Consider that if the S&S couplers are not installed properly that you will experience the worst kid of frame failure imaginable and serious injuries are probable.

S&S has to consider liability issues and as such will only let people who know what they are doing install them.

I work with a frame builder who is S&S authorized and installing these is a step above what an inexperienced builder will be capable of doing and most of his couplers go on tandems and longtail touring bicycles where the stresses are even higher.