My Escape proof Octopus Tank

[Octopussie]

well i have just constucted my first octopus tank. whatcha think? its a 50g tall tank, xp2 canister filter, seaclone 100 skimmer (modified a little), 36 watt uv sterilizer, inline heater.

i cut a piece of plywood for the top and constructed a surface skimmer for my canister filter out of a breeder box(i made the slits in it as small as i could). no octo yet but i do have a xl domino damsel (this thing has cycled 3 of my setups so far, hes been threw hell and back many times) to cycle the tank.

so just tell me if ya see any flaws.
tanks,
Anthony