Reviving this older thread to keep all the questions in a single place.
I read and found very useful Karen's article, but I have a small query about elbows. From the instructions and the video it's clear that elbows are to be tucked tight to the body at the bottom, but I've found that with the narrow hand spacing it is hard to not let the elbows creep outwards slightly when coming back up again. Is a slightly curved 'elbow path' okay, or should the elbows (viewed from the front) not move out of line with the side of the body at all?
I assume the latter and can just about manage it by focusing on the cue to screw in the shoulders, but it doesn't come naturally... yet