reversed EF lens macro setup

this is the setup with my canon 10D and homemade EF-mount to lens thread adapter...

i used a 12mm kenko tube (which i can still reassemble) for the mounts and contacts, old computer cable and plugs (to connect to the mount contacts without soldering), a piece of polystyrol plate, saved micro screws and a film canister for the rest...
cost without counting the kenko tube and 55mm to 58mm to 55mm to 77mm thread adapters (which i can all use separately): 2 euro

examples:
ladybug
fruit fly
ugly bastard
etc.


EDIT: meanwhile, novoflex sells similar gadgets, but mine was first