Hi there!
So I have a bit of a weird situation with my current set up, in that I have an Aquatica housing with LED flash trigger, and a YS-D1, and a YS-D2. As has been documented in various forum threads, the YS-D2 is not very sensitive, and so doesn't trigger from most LED flash triggers. That means that the solution I came up with is to trigger the YS-D1, and have the output of the D1 trigger the D2.
That means running a fiber optic from the housing to the left (D1) strobe, and another fibe