Okay, we built a trellis-roofed patio and have four 4' pieces of 8x8 posts left over. What would be the best way to make some sort of seating furniture for the garden? I was thinking of attaching a 1'x1' piece of plywood to the top of each one and topping that off with a rustic floor tile. Then i would plant the posts in the ground, leaving them about 3' high. Sorry i don't have pictures to show, but does this sound do-able, or will there be problems with the four extra inches of plywood and tile hanging over the sides? Thanks