Hi ,
I'm the owner of the TRT-Electronics and we are the manufacturer of TURTLE triggers. I guess the WaterPixels could be a good channel to contact the customers who need some help to get the correct picture from Our products and the TTL underwater photography.
I have been taking photos underwater since the 2000s and I think my knowledge sharing could help to you in several topics.
Of course there is a limit (Please don't ask me about details of TTL protocol!)) :))) So i can't answer all questions.... But i try to do it.