Dry fit the Building Jig pieces to make sure they go together and all the upright pieces fit into the slots well. If they do not go to the bottom of the slots use sand paper and/or a sharp chisel to fine tune them so that they fit well. Once you are assured they all fit, apply thickened epoxy to all the joints.
Use a sqeezee bag to apply a thick bead of epoxy on all inside corners and clean up the corners with a radius tool such as the back of a tongue depresser/mixing stick. You want these cradles to be skookum and to hold up to any abuse you may throw their way during the building process.
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