Underbody Problem?

[4mcqueens]

Hey All,

So we're looking to pick up our 3941FO (new, but dealer stock) this weekend. Once of the things we noticed when we did an initial walk through (among other things) is that that the underbody panel has been cut all the way across (left to right) about 6 feet behind the rearward axle to replace/repair the black tank valve at the dealership. They had riveted the panel back in place but used what looks like seam/duct/whatever tape which wasn't sticking for crap (veiled black tank joke there). I told them that I really need that addressed before we sign off and take delivery. From my uneducated perspective I can totally see that seam getting pressure washed by road spray the first time we're towing through the rain.

My question, how much of a stink should I be prepared to make here? It is reasonable for us to ask for a replacement underbody? is "tape" really how things are sealed back up when they cut into the panel like that?

Thanks for the advice!