Well, I set out on a venture to build a torpedo system not knowing that Tugboat was already working on one. My primary goals were to make a torpedo system that was light weight, has reusable ammo, and is cost effective. I mean, let's face it, 1/4" balls are heavy and not very hydrodynamic. Like Tugboat's system, my system is also rod-based. Unlike Tug's system my system is completely pneumatic. It also is reloadable "at sea". The system fires custom-made torpedoes (.17 cents ea). These torpedoes float and they are magazine fed. This gives my 1/144 destroyers a little more punch without adding to much weight above-decks. The main reason I was working on it though was for use in a submarine. Under this system I can fire torpedoes that travel more than 40' in the water (that how long the pool is and they go all the way across it and hit the wall on the far end). I still have to test penetration power, which I expect to be far closer than that, but it does reload "at sea". Using this method the Gato that I have in production can carry about 8 shots. I have 9 different prototype torpedoes that I am testing out. ...there were 12, but I eliminted 3 as they are too heavy. All of mine are blunted dome-shaped rods. I'll be kind of busy for the next week or so, but as soon as I get a chance to conduct some more testing I'll post an update.