Your work looks great so far, keep up the good effort! For what its worth, in May 1992 I spent a day as a guest of the Point Loma submarine base in San Diego. Among the other guests were several DKM veterans, including Heinz Dressel who severed on U-595 and was captured by allied forces. Herr Dressel was very pleasant and willing to talk for hours about his time on U-boats during WWII. One of the many questions I asked him about was the wood used on the deck on U-595. He was certain it was teak and said at the time he was surprised that Germany was using such a valuable and hard to obtain material during wartime. Anyway, that is what he said about the deck - I don't have any way to confirm his statement. Part of our visit to Point Loma included a guided tour of an Los Angeles Class SSN (USS Dallas or USS Houston - I can't remember) - Heinz had everyone laughing with his comparisons of a modern nuclear sub to a wartime Type VIIC! He really had the crew going a few times!
Cheers,
Bill