Same here, I used this mod and I'm currently sailing a VIIB. Awesome, the only bugs I saw were the black line that is broken on the sub's sides, and the low wire cutter texture that has what seems to be vent holes on it.
Minor issues in my opinion. I'm very happy to have a "clean but not too much" texture for the VIIB and C.
Your next mission, if you accept it, will be to make textures for the type II, the type IX and eventually the type XXI. Of course, if you or one of your teamate was killed or captured, the bureau blah blah blah....
Nice job !