When designing the chassis for the camera to TwinStar I solved the problem, how to such as tight glue plywood to the so-called butt ( without locks, perpendicular to each other two plates ). I wanted to use thick CA glue that will "spill" outside the contact area and increases the glued joint. But the thick glue will not soak up the plywood and stay on the surface. This on Poplar plywood, which is a soft, decrease in strength, the surface layer of wood is easily separated. I got idea to use super thin CA glue and penetrate the join before. Super thin CA glue very well soak up the whole top layer of plywood. Then apply a medium-thick or thick CA glue. So established joint is stronger.
The red border on picture shows soaked super thin glue.