Tomoose, don't throw out your ideas!!! There's always a better idea around the corner. This ones not set in stone.
When I made the handheld
AoB Calculator back in 2007 I was following a previous 2 dial calculator that I'd used for SH 3. I added a third dial to help with AoB findings and simply cut and pasted the numbers literally onto the hand drawn dials. Pretty much a homemade attempt (PhotoShop can do wonders with erasing the glue spears). I had never seen a Was-Is (or is it Is-Was) before putting out the Calculator. Anyway, a much better looking Calculator made by reaper7 is stickied over at SubSim's Silent Hunter 4 main page, and he graciously gave me credit for his fine work. I'm very pleased to have someone else further on my attempts, when a little credit is thoughtfully used. We're all in this together, learning and doing and spinning our wheels for the enjoyment of the game. Everyone contributes, and we all get ahead at the same time.