Just added the shark diffusers, the beam narrowers, and the protective rings (for general diving/transport). I hope they will announce their off-camera trigger soon.
Alex, wanted to ask, are the strobes you used the "final" model with the higher power output, or the ones you originally tested months ago?
In the beam comparison, although the center-spot GN was slightly lower than the YS D2, the overall light output across the circle seemed noticeably brighter. To get the same wide, even, diffused beam I would have to use the "strong" diffuser and lose 1.5 stops on the YS-D2. In fact, it looks like these do not really need a diffuser at all unless you are shooting fisheye.
Hope they get here by August, as that is our peak diving season here in S. Fla. for everything from nudis to Goliaths and look forward to deploying these!