Thanks!! So it sounds like some fluffy super-chunk setup is the way to go.
The only way I can put a wider face than 24" is if I build it like this...a rectangular triangle shape:
I am limited on the B-C side by space but I can go bigger on the A-B side. So instead of 24"x17"x17", I'm thinking it would be a 30"x22"x17" (not sure on the geometry, not at home at the moment). Would this even make a difference??? Again it's gonna be 10.5' tall so that could add up to quite a bit of fluffy added on.
I'll definitely add those supports every few feet, thx localhost. Theres some great build threads with pics here on GS....might even be kinda fun lol.