A little searching led me here - read the comments: Sea and Sea YS-01 vs YS-03 - Underwater Cameras Blog by Mozaik
However, another user has reported experiencing issues with this setup: Sync Sea and Sea Ys-01 with Sea and and Sea Ys-03
Also, DiverVision lists YS-01 as 'in stock' for $350: SEA & SEA YS-01 Strobe (Black)
However, another user has reported experiencing issues with this setup: Sync Sea and Sea Ys-01 with Sea and and Sea Ys-03
Also, DiverVision lists YS-01 as 'in stock' for $350: SEA & SEA YS-01 Strobe (Black)