The E12 is perfect for a Super Big Bertha.

When they first came out I bought a bunch of E12-4's that turned out to have the bad date code. I had a beat up old Super Big Bertha and I figured I wouldn't be too upset if a cato destroyed it, so I gave it a shot. I got a couple of beautiful flights before one of the E12's finally blew. The plastic nose cone softened from the heat of the fireball and it deformed when I picked it up.

FWIW, I measured the fin thickness on the remains. They're 1/8" balsa.

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John Buscaglia
NAR 27366
SAM 63
CMASS Member