I am interested in this too. I get a shimmy from time to time and assumed it was a balance issue. However, I watched a Poundstone video about Glutes and he said your butt is in control of lateral knee motion. Which would make me think it's a butt issue if your knees move laterally.
I am Anton Zdravko Martin!
Best meet lifts: Sq 150 Kg (330 lb), Bench 120 Kg (264), DL 160 (352) @89 Kg (197)
Best gym lifts: Sq 375, Bench 275 (pause), DL 370 @205 or less
Goals beyond my wildest dreams, 600 Kg raw total, 200/160/240
Hack away at anything which isn't essential. Do what you love, and do it often. Fazc.