Hello!
I am Simon, I am from Toronto, Canada and I (so far) we have only dived the nice warm water in the Caribbean and the Indo/Pacific regions. Last dives were to the Philippines (before the '19) and that was grrreat! ... 'not another frog fish'.
I have lately dove with an aging Sony RX100m2 in Meikon Plastic with an Inon Z330 and Archon VL using an Inon UCL165M67 Diopter for Macro and a DIY fiber-optic Snoot for the '330 (as non were available retail before my trip) using 'rino old school cardboard cuttouts and a friends wet 3D printer. Using the strobe (primarily) and the snoot completely changed my underwater photography life. I resisted strobes so long - I was so wrong.
My biggest personal challenge (as an older, and once a year diver) is remembering the motor skills and the (paltry) imaging skills that I learnt the previous year.
I am looking to an improved housing, improved optics and a back lighting armature for my snoot.