OK, let me say something about your work.
Specificity of your models is superb - no comparison to stock one and any other models using earlier by me.
I've noticed two graphic glitches - KDB has different colour than rest of the boat and 2cm Flak mounted on early version of VIIB behind Turm has no reflections on the water.
I see that generally you use dark colour skins. During IIWW Germans use two colours painting their U-boots - Dunkelgrau 31 (Dark Grey) and Hellgrau 31 (Light Grey). Light Grey was used more often than Dark Grey - could you create proper skin for your models?
Don't know why, but 7b krieg 39, 7b vorkrieg and stock one have the same skin with two emblems - 7th flotilla and skull with hat and umbrella. Is it possible to make clean skin without them?
Last thing - it would be better looking and more real to create rusty and "fatigued" skins. Now they look like directly from shipyard
But these are only details - for me your models are absolutely "must have" to play.