Did a test cut today with one 4x8 piece of wood (wanted to make sure everything 'worked' before buying all four boards.) Things went surprisingly smoothly. There is a nice wood shop on Raul's family finca (farm), the jigsaw we have is a serious cutting machine, and the cutting went way smoothier/ easier than I suspected. Props to #artschool for teaching me some wood skills.
We opted for 3/8 inch plywood. I was worried that it would be to heavy, but the pieces themselves when cut out are very light, sturdy, and I think will pin flat against the wall easily, without braces.
Gonna do a paint test tomorrow....
This is probably the layout I will use when cutting out the figures to make efficient use of the material of each 4x8 board (the brown rectangles). I managed to fit all 7 pieces in + the Olympika logo on 4 sheets of wood which is good.
Once I get hold of a projector and pieces of wood, the work in the "real world" will begin....