I have four Galvanised poles with four pine shelves (900x220x20) sitting on gate-eye tube clamps. The poles go through the wood on the corner after i cut the holes. Pipe is 33.7mm, i cut the holes 35mm thinking the wiggle room would help. It has not.
they just rest on top and as you can guess the whole thing is unstable and joggles around.
Without getting a bit more pipe and fixing the top to the wall (i rent, not allowed) how could I make the structure more secure.