Next, I began by taking the existing mortar tube boxes and cutting them down to size. Pics that I've found show the boxes were 4x4, while the kits were 4x5. I cut off 1 row, adding sheet plastic to cover the open side. Then I built the raised mortar base, but I believe I made it slightly too large and I'll have to rebuild it. I also built a modified skate rail that the mortar bipod legs will mount to.
That's it for now. I'm currently working on the rear plate and storage boxes.
All comments are most welcome. My thanks to Steve Zaloga and Ken Abrams for pointing me in the right direction for reference pictures.
Steve