I've had a SMB style galley box on my wish list for a while. After some planing I started rounding up materials and got to work. In the spirit of trying new things, I decided to use 8020s quick frame to make the skeleton of the box.
I ordered all my pieces cut to length and anodized, so all I really had to do was hammer all the pieces together. Some unions fit better than others, so i ended up using epoxy inside the tubes to permanently bond the joints.
I bought a bamboo cutting board to use at the top, I had the idea to make it removable so it could be used on adjacent surfaces.
Installed 1/4-20 threaded inserts into bottom of cutting board
Added rubber feet, these also locate the cutting board on the top of the cabinet.
View from below with thumbscrews holding the cutting board to the frame. You can also see the rivnuts I installed to attach the catches for the slam latches in the doors.
I also buried some strips of plywood in the tubes the piano hinges for the doors would attach too, giving me something more substantial to screw to.
Test fit on door. I originally had the box on hinges, but it didn't feel substantial enough. I ended up bolting it directly to the door with three 5/16 bolts on each side, I put some aluminum angle inside the door with rivnuts for the cabinet to bolt to. It's rock solid now
Doors mounted, I got pre-made coated wire rope sections from McMaster to hold the doors, worked great. The cabinet side has a rivnut in the tube(s), the door sides are threaded inserts CA glued in place. I'd feel good putting 15-20 pounds on them. I made the doors the same way as the cabinets, 3/4 ply, laminated on both sides with t-slot molding. Still figuring out organization.