Well i have an older tub by Santanna spas with a Air operated switches and Dial type timer ect. i am remodeling one of our spa stores old locations for a new company and there was a Phoenix Spas control pack made by Hydro-Quip mounted on the wall out in the shop. there are no top side controls or heater controls that i can see and the PSI switch was looped. i'm wondering if its reasonably feasable to use this in my tub or will it cost me an arm and a leg for the missing items needed. i've included some pics, doesn't look like the heater was ever hooked up, but they had it wired to a disconect on the wall.

heres the rest of pics