Whoa, I think I'm in love.
I had tried TMO eons ago, version 1.x and did not like it for reasons I cannot remember and had been using RFB since then. But RFB has not been updated in a while and I could not get Nisgeis 3d TDC to work to my liking with it, so decided to give TMO 2.5 a whirl.
Well I am converted, SH4 feels like a whole new game. I love the little touches: being able to click on the planesmen to go deeper or shallower, the new intelligent sonar man who will actually call out contacts at more than point blank range and who can answer queries so you dont have to continually man the sonar yourself, the way the sub feels when it dives and surfaces, etc., etc.
Great job, Ducimus.