I have not heard/read where anyone has done this. Can you describe what happened?
It sounds like a custom welding/metal work job is in order.
I am toying with the idea of upsizing my water tank from 27 gallons to a 40 or 50 gallon size. There are several web sites where these can be purchased. If/when I do so, I intend to take the camper to a local
welding shop and have them fabricate 1 or 2 cross braces of 1" steel square tubing for center support.
Or, being ever thrifty, I may just bolt something together here at home.
If you were to do something like this, I would think that putting a metal or diamond plate "skin" fastened
to the supports would be fairly straight forward.
My Pod had no center support for the water tank and bulged downward quite a bit when full of water. My
neighbor did something like this to his 5th wheel and is pleased/more comfortable. My Coleman does have one center support, but it is
very flimsy and bent downward after the first use.
Sorry to hear about the problem. I wish I could be of more help.
