Don, if you don't mind me asking, what are the specs on the computer you are using? My question may seem off topic, but you may see where it is leading.....
There is incredible new technology available, cost effective technology, which will do the deep water recovery job efficiently. Clam shell bucket type devices are the 386 computers of years ago.
I myself am often hesitant to try something I am not familiar with. We all usually prefer "cold comfort to change" to quote Pink Floyd.