If you can, I'd get rid of the wood lid and make yourself one out of plexiglass.

I made the below one to fit on a 45G tall tank, divided in the middle so I could house a pair of carpet pythons. You can get all of the hardware at the plastic store and once you add in latches, you can get rid of the weights and straps as there is NO way a snake can open one of these as long as you put the pins back in.