We had the same problem on our 33RETS. Ours is at the shop right now getting a new grey tank installed. The wonderful tech at RVWholesalers put some butyl tape on it and said he fixed it. Not so much. He also closed up our underbelly with nothing but duct tape and said he'd never had any fall off. Not so much. So, after driving it all the way up to Alaska with a leaking grey tank, we are finally getting it fixed now that spring is here.
By the way, the techs here had a good laugh at the guy from RVW who was incompetent. At least I'll have a new tank and the underbelly will be sealed properly.
Glad you're getting it taken care of.
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