Thought I'd add a bit, hi Mark and co, Dave,
I make my own ratchet inserts for the Tx, its just a brass strip about 4mm wide, hole one end for the holding screw and for the ratchet engagement I simply solder a 0.5mm section of brass rod across the other. Do the solder first, then it's easier to approximate the hole position. I tried the sharp bend but the strip breaks.
Saves robbing another set, and so simple to fabricate. I think most of my units are on ratchet, even the rudders, as all the units have displays so I can see where the servo travel is.
You'll have fun with two winches and a rudder to control, I built a large cargo boat (6 feet) and had tank stick steering, rudder on RH stick and ramp up/down on LH stick plus an additional stick mounted about the aerial for the bow thruster left and right movement. Fingers and thumbs keep moving…… lets all have a cup o' tea.
Aye, Kimmo