Noticed in your first post you inquired about retractable and rotating front planes for your sub .
Ive recently built amongst others a Revel Gato using Dave Welch system which would obviously need some beefing up for a model your size. However in a web search awhile ago I found these pictures which show a much better system and obviously for a large submarine. I think the pictures are self explanatory.
The sub looks great Hope this helps
Best of luck
Excellent retract system, I should know, I built it
. I made it to fit my mates OTW HMS Ocelot, so it should fit a 1/32 S Class. There were no machined parts in the build, only filing and cutting. The upright brass plates were the only silver soldered parts, everything else being soft soldered. The braided pushrods were stainless bicycle brake cable and offered just enough 'give' to avoid any binding issues. I spent 6 weeks thinking the design through and about 10 days building it.
The next system I hope to build is a retractable system for a big Sheerline Alfa, the problem with this fit is that the planes extend out from the hull horizontally, not pivoting like the Typhoon or Type XXI, but straight out. They are also one above the other slightly, port to starboard, to fit in the tight confines of this small submarine. This I may ignore!!