1/96 skipjack 1:72 1:144 2.5" 2.5" standard wtc 3" wtc 212 adf akula assembling a wtc assembly ballast tank batteries british build buoyancy c2-t/r copeland dry dry hull esc export failsafe fail safes gato inline kilo lighting lipo guard lpb maximum depth mbd mixer modern modular moronic noob ohio ordering oscar 2 out of context posting pictures power switches pump replacement scaleships seal seals seaview seawolf ballast system servo set-up shafts small snort snort sombra stabilizer subdriver sub driver submarine torpedo torpedoes shutters transmitter tubing type 214 type vii u-212 u class weight wet