When connecting two pieces of wood together, drill a pilot hole for the screw through both pieces of wood.
Then drill a larger hole through the outside piece, large enough for the screw to go clear through without engaging the wood.
Then when you screw the pieces together, the screw only works on the inside wood piece, drawing it tight against the outside piece.
coconut said:Could you put your glass and whatnot in the bottom and put the concrete on top? Making the stones 'upside down'?
I would think the glass and whatnot would move around a lot when you put the concrete over it.