I only use DuBro tanks. Every plane that I put together, the stock tank gets tossed in the can and I replace it with a DuBro.

I wrap them in fiber reinforced strapping tape, both lengthwise and around the body in the front and back.

It keeps them from expanding and looking like a pregnant football. I think that as long as you can keep them from expanding, the seams will hold. I've seen them leak when they weren't taped up.