My favorite sub. This one has David Merriman's Sub-Driver in it. Nice part about his system is I can get to waterline after diving. As seen here:
![](http://i1089.photobucket.com/albums/i345/t_chalfant/Keystone%20CO%202013/1Keystone072_zps8c6f400f.jpg)
This class of sub has a lot to hoist up out of the water.
Even as just a surface runner, it is a great looking sub. Look forward to your build!