I currently have a pretty straight forward plumbing system. 2" piping, being sized to 1.5" to enter/exit equipment. The easiest place to put the SWG would be the diagonal pipe in the foreground. Are SWG's required to be installed in a certain orientation? How about the flow switch and a proper amount of straight piping before it?
I'm also looking at upgrading the single speed Superpump to a variable speed pump. I am considering a A.O. Smith ECM27CU dry end replacement, but if the plumbing for the SWG is going to be involved, there is really no reason to only replace half the pump at similar prices.