Bob, Sophia is a true beauty and you're a lucky man to have her in your life.

I think one could study Tiger tanks of all varieties for the rest of one's life and still have volumes to learn. The Shermans were also a tank of ten zillion variants, but they didn't get recovered and re-used like the Tigers. Another thing I learned at that page that I have to confirm is that yes, Dr. Porsche designed and built the first 50 turrets, which all ended up on "Henschel hulls" because Porsche didn't get the contract so never produced the hulls he designed to go under his turret. I'm trying to find out if Porsche even did a prototype of his hull, but I don't think they did. Heck, I can't even find drawings of a Porsche hull.

And the search goes on. The thirst for knowledge must be slaked.