Will the reference sheets have combat rules? Because if not, while a great thing to own, it's not complete as a game. IIRC, the OD&D rules point you to Chainmail for combat rules, and Outdoor Survival for wilderness exploration.
Edit -- whoops, I see this was already discussed. Well, FWIW you can (or at least, could) get Chainmail as a .pdf. I bought it a while back; not sure if it is still available.
How is the wood in the box?I've got a box!
Cheers!