When we take a trade in on a Hot Spring that leaks, we have had better luck going through the foam in the bottom. That way, you dont need to damage any side panels. Unfortunately, there is no easy way to fix a leak in a full foam spa like your Hot Spring. You have to start digging out wet, nasty foam and hope you get lucky. A wire brush also helps to remove the old wet foam from the plumbing. We are in Ann Arbor if you need some more advise. We take in lots of trades from people in your exact situation...