I've enjoyed all the replies to this OP, but somewhat seriously, has any
one built a personal sized SUB, say 4 person cap. With a max dive depth
of say 40 feet or so, this should be do able, no?

Try this one. ;-)

http://www.ussubs.com/Luxury_folder/lux.phoenix.html

Steve
Stephen C. Baker - Yacht Designer
http://members.aol.com/SailDesign/pr...cbweb/home.htm