Most of us old farts started life with Darwin tanks, made the same way from the same material, as well as Thomas and Acme and other brands. Brass tanks are good, they take a little care, like dont put it up with fuel still left in the tank. I never had a cracking problem, probably because I broke them before they broke themselves. I have used Acme from time to time because of space limitations and had no problems in fuel draw, just some green junk. No reason to be afraid of them.