Tomoose,
That is a very good idea! I think it would be possible to take a video feed out of one of the monitors to a small screen inside the periscope.
You are right that currently there is not enough room for a 360 degree rotating periscope. However at some point in the future I hope to replace the Coroplast with a more sturdy and refined wood structure.
At that point I've been wondering if I should go "all in" and design a standing Conning tower/ Control room. Then it would be possible to make room for a 360 degree periscope with your video monitor idea. Something like this -
A 360 degree rotating periscope would give a whole new meaning to performing a Stern Torpedo Attack. Very cool !!!
Thanks,
Tim