Rotations are, I think, similar to your "elbow pronators" that I seem to remember you talking about (palm up, slowly flip over so palm is down, repeat). What I called sideways curls start with the palm perpendicular to the ground, thumb up, and then move hand up (thumb towards wrist) and down (pinky towards ground). I think that a wrist roller with plates or wheels to grab instead of handles would work similar muscles.

Not fancy, but covers rotation in all three planes. I've been advised that, as flexible as I am, if I practice wristlocks regularly it's a really good idea to have the muscles there to push everything back into place.

Thanks for the squat advice. It's also that the lower I go, the more my knees start to cave in if I don't pay close attention, and getting to where I automatically don't do that is a good idea. Still, I guess that's what healing time can be for...

Shoes vary between an ancient set of trainers and a pair of army boots with a small heel. I know this is not ideal (though boots are better) but shoe shopping sounds hard. :P