Welcome to our forum.
You know that warm fuzzy feeling I had this morning when I posted how they came back and did what they originally promised? Yea, after reading this, its gone.
Heh, I *knew* there was something else I wanted that we all used to get with our cars that was totally money down the drain... I'm almost surprised there *isn't* an undercoating for spas that's supposed to keep the heat in, animals out, etc. Oh, wait... let me make a website! (Of course, there is the perennial argument on plastic vs wood vs meta frames for spas... those *could* use the undercoating!)
And since I have no training in mechanical, fluid, thermal or electrical engineering I know just the guy who would hire us and provide a safe haven for our crazy ideas