When sailing two-up on the Spitfire, I would tell the crew (young teens) that they are responsible for ride height, while I am responsible for direction. We never tried to coordinate our actions, but just 'let it happen'. I have to thank John Pierce for this - it worked a treat, practically stopped us capsizing, and allowed to sail comfortably in silly winds.

Now I am sailing the Shadow, singlehanded, I'm adjusting slowly to the lack of a voice operated downhaul and rotation control system... and beefing up the muscles in the hope I can leave the main uncleated too!

I find Scooby's description of steering with the tiller under the arm, while trimming the main, and tweaking the downhaul / rotation just too challenging for words! I'd be in the drink in no time like that.