If I were you I might go for the 5 pole 385s instead of 380s.
They should give you much smoother control at low manoeuvring speeds.
You then may not need the gearbox(es)😉
Even with the gearboxes I think the 385s would be better.
Cheers, Doug 😎
BTW The gold ESC in your pic reminds me of the Hitec SP-6 ESC I had in my Sea Scout, then briefly in HMS Hotspur ca 30 - 35 years ago! Still got it, an' it still works😊