Have done a nicely molded 3D model kit of the Australian A class submarine ( AE1/AE2 ) in 1/350. Hull is split down the middle for hull. Conning tower is a single piece and on the raft of bits you get forward and aft dive planes. The submarine is an E class used by the royal Navy. This 3D printed stuff is amazing as last week I bought a replacement barrel for my AFV Club M1128 Stryker as the printing is so good that rifling could be seen on the end of the barrel.

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I've just received my first ever 3d printed ship - from a company on E**y called Skillball's Miniatures. They do a great range of very affordable small scale warships, and I was very pleased with the quality. (I have no link at all with the seller)
Recommended!
(Now I've got to work out how to paint it...)