WTC endcups for RC submarine.
WTC - water tight cylinder. Outer diameter is 75mm.
- front endcup
- rear endcup - has motor mount and holes for push rods.
- push rods enhancements
RC submarine build log you can find at http://imelnikov.ru/model/submarine/3d-print-wtc
I prefer to use ABS, as it is more durable. Use aceton for post processing. It also increase waterproof.