I am steering towards 360 (pun intended)
I want to keep it simple (without spending a mint) and control is not about speed but accuracy IMHO
I will use two rotary knobs to control and indicate the position of each kort and port starboard throttles split on left right friction sticks
Only testing in the water will determine what I might change. AND lots of practice.
From a lot of watching it seems LESS is more, see what momentum does before over reacting.
EDIT
I guess the most important thing is the direction of the thrust, no point applying any amount in the wrong direction.
I dare say in time with OPENTX I can have multiple settings and flick a switch for basic sailing controls with no tow OR simply put tank steering OFF