As I progress, I do have some plumbing questions. I am in Florida, so my engineering plans call for only an 8" spa wall. my spa is 7'6"x7'6". I am putting in 5 therapy jets. I am looking at using the balboa 10-5100 (or the cmp 23300-100-000, or waterway 210-4120-these all appear the same). Looks...