P. Christopher sent me his recommendation for avoiding cracks with a totally different side bending method. Thanks again for the email, and keeping up the very fine work.
I’ve been through the pain of cracks…I bought a silicone rubber heating blanket from Watlo heaters 314-878-4600, which cured my problems. Through them it cost about $75.00. You’ll fall in love with it…You don’t necessarily need to make a separate mold-sandwich it in the guitar mold with the sides-clamp it the same as you did when you bent your first sides. I’m pretty sure it needs to be between 220 and 250 degrees f.
(here’s one of my first)