I ran the zipty tank for a few years, but after 3 cracked tanks, just gave up. I was disappointed that with the last crack, the zipty folks would not even call me back. By the way, cracks were all under tank, so not crash related. As long as you don't mind buying a new tank each year, no problem. a
As for MX, I switched to MX from offroad, and just run a stock tank. Much thinner.
Rick