Balsa Model Assembly Jig

The larger slotted one provides a way to hold 3/32" thick balsa or plywood pieces squarely for joining. The second narrower slotted one is for 1/16" thick pieces. The tall ones help align curved or slanted keels.
Each slotted piece attaches to the rail with a Tee nut that's threaded M4. Threads are crap and need to be chased with a tap. Slotted pieces on top are good to go as is.
Each assembly is held together and in place by an M4 x 12mm socket head cap screw.
Each leg assembly is held in p