It’s great to hear you guys will soon have a proper solution for sonar depth finding.
See below current solution; it does work, but as I’m not thinking only do this ones, a device without moving parts and optical risks would be much better.
You might be interested in the low-drag thruster deflector I has made in China. It supposed to fit tight over outside diameter, but they made it a few mm to big. I think that’s not a problem, and I’m planning to fill the distance, and fixate, by hot glue gun. As outside-ring gets smaller at the backside, this should prevent the deflector from ability to be pulled-off to the front. But maybe I can find a better solution with small clips. I had to invest in tooling just to get some samples (luckily I have good contacts in the Shenzhen wire mesh industry), and have a reasonable MOQ.
I will update after start assembling it with the T200.