Agree with Bill, my single place biplane has an aluminum 20 gal. tank, with-out a bladder that sits behind the dash right in my lap, as do all of them still made today. And again, tain't blown up in 54 years, no reason for it to now unless its leaking. Drove midgets and sprinters for years and they all had fuel tanks for a back rest. Anyway, if ya have a wreck so bad that it gets to the tank, ya might as well go out in a blaze of glory!
Denny Graham
Sandwich, IL