This is a new base type for the Modular Hydroponic Tower. I designed this to mount to a ¾" plywood board. I increased the width of the top for better stability and to make room for 4 screw's. The design is meant to be used with #8 x ¾" screws. The depth of the tunnel extends past the inside board to allow water runoff without it touching the wood.
The author remixed this model.