The biggest joy from having three subs was making a wolf pack and having a place that I made for display they were a joy to build and now look great I used a thin wire to attach the torpedo extended forward from the sub as well as thin string for the wire. see the rest of the pictures

one of the three subs

the third of the three subs

the first of the three subs

if you look closely you will see the torpedo projecting from the middle sub