Paul,
of course - both you and your boat are very different from me and my boat.
First of all, I am four or five notches smaller than you, and actually, I rounded 70 this Easter, so when I raise Ingeborg’s sail (..same size as yours...), that job calls for my full attention.
Secondly, Ingeborg is an IF, and is very different from the fin-keeled boats I used to have. These could be tamed simply by shoving the tiller fully to leeward (like Ilvy). Ingeborg’s rudder cannot be squared off like that, and besides, her trim lines and big keel area makes her set off each time the sail fills a little. Even the little friction in the sheet is enough to produce some drive. That drogue (..or a mate at the tiller...) is needed to keep her from picking up speed and then tack, if she feels for it.
I once sailed in a friend’s IF; one with the original rig. When we tried to heave to with a backed working jib and the tiller locked to leeward, she would hunt about quite a bit, and finally pick up enough speed to tack against her backed jib. Only after we took a reef in the main, did she heave to correctly, making next to no speed, and with a constant pointing angle.
I find that the behaviour of different but similar-sized boats varies a lot more than the behaviour of our cars.
Arne