So this week I finally got the rockwool batts and did my fast and ugly build.
So now I'm trying to figure out how to upload an image...let's see...Okay, got that sorted out.
So this is three 3 1/2"x23"x47" batts of Roxul rockwool cut in the more or less obvious way to make an 8"x8" rocket.
I'd say that cutting the rockwool with a bread knife is a piece of cake, except that would be overstating the difficulty. It's nice to work with. Not dusty, not itchy.
Doing a small burn here in the garage just to get the most preliminary feel for the thing. Obviously I need more than gravity and duct tape to hold this thing together.