OK - so no-one responded so I went ahead and bought a couple of stacking lenses from Sea and Sea to add to my DX1G (I also treated myself to a YS110a strobe - Happy 40th to me!).
Sooo after a number of outings I have been made the following observations....
1. I should have bought an other lense caddy
2. My camera set up with the twin stobes and additional wet lenses now looks like a Christmas tree!
3. The diopters work great, but the distance between subject and camera is a lot less, and so makes taking the picture more difficult, but when I do the clarity and detail is wonderful.
4. Realized that what I REALLY want is a wet telephoto
Some of my recent shots with the new lenses can be seen at....http://www.facebook.com/pages/Indigo-Dive-St-Vincent/86847095454?ref=ts