I am curious if anyone has every replaced the Headhunter Mach 5 water pump with a shallow well type pump? I was looking at some specs and you can get about the same flow (Mach 20GPM, Well 16GPM) for about $1k less. I don't need a new pump now, but was just curious if anyone has ever looked into this or not. The shallow well was an inline continuous flow type that runs on 110V.