Sorry about the language! The smackdown comment was in jest; I have a fairly thick skin nowadays, so lay it down as you see fit.
As for tools, we have a manual brake, a metalworker (punch, shear, notcher, and angle cutter AIO but only on metal less than 1" thick) a large metal shear (IIRC it has a 10ft blade, with adjustable rake and depth aperture, good for paper to 1/2" plate), a miter bandsaw, a damaged bandsaw (some of these welders can't or won't read labels and instructions T_T) a portaban, disc grinders, wheel grinders, 7" and 4" hand grinders... And that's just the welding fab area. On the machining side, there's tons of manual and CNC lathes, several types of drill presses, a heat treating oven, some CNC mills... There's even an ASO.
how does the ceramic board stuff hold up? I'm guessing since you didn't suggest it, that the rockwool is better or cheaper, or both? As for disassembly, that's a good idea, should be a breeze to add some bolt points to the shell; my only concern there is the rockwool not holding its' shape properly.
I'm assuming your 6x6x10 is just an example; that sounds pretty big! I don't intend to be messing around with anything that needs space that big for quite some time. I do see your point with two burners providing a more even heat; I'd imagine that the burner angles would be opposites, slightly towards (but not directly) opposite corners?
An evenly-sized shell of 10x10x10 with a rear door would be a 5x5x10 interior. Two 1/2" burners with a 20* angle on each, one facing towards front left, the other towards rear right.
. . . In my head this is starting to look a lot like Sams' forge design, haha.
Still reading through the Forges 101. Vertical and Clamshell sound like more trouble than they're worth.
--CK