I'm glad to hear you are OK!!!!
750+ CHUCKS out and this is the first inident I have heard of.
While it sucks, it definately reinforces the importance of protected batteries.
Now, here is what I am proposing to you...
I want to examine your CHUCK! I have tried to induce a battery venting at least a dozen times for testing and they would never cooperate.
If you send it to me, I will build you a replacement... NO CHARGE.
Once again, glad you are alright!
That kind of response is what will keep me buying Chucks.
With all the exploding mod threads that have turned up, that thought crossed my mind today. If not for the Chuck's solid build...it would have been shredded like the other ones we've seen here.
All that being said....these mods are bombs. No matter how strong the material is, a sealed container cannot contain rapidly expanding gasses. That's the entire concept behind high explosives...fireworks, pipebombs...
Vent that rear cap with a nice big hole...it won't impact the function of the Chuck will it? Of course, with one hole to vent all the rapidly expanding gasses...it may turn into a battery powered rocket...but it's better than an atomizer through the teeth at 40mph.