I have used a diy fluid for drilling for the first time. Used bicycle chain oil...water and detergent. Quite happy with it. Drilled the largest hole yet. And it looked almost professional.

Also a photo of the oak enclosure after it was treated with boiled linseed oil. The oil makes the oak enclosure look a lot better, it really brings out the grain. As usual I don't have "before" pictures to show the difference. (the pictures below had a partial coat already)

I'm not sure what to seal the wood with. Suggestions are welcome. Right now I'm thinking about shellac.