The dip is where things actually go wrong for you. You are shifting on to your toes when you do so. Think about staying in your heels as you bend your knees. Mid foot is actually where we want you, but that cue should help. Also, see if you can make the dip faster. Think about reacting against the bar a la Ilyin on his jerks.
You have been on these boards for too long to be squatting 275 pounds. You need to be stronger. This is non-negotiable for Olympic lifting. I have a 155 pound woman in her mid-thirties who has been lifting with me about 6 months. She squatted 242 pounds at a meet on Saturday. 242 is not that far from 275. She squatted 215 pounds for sets of five about a week ago. That's after six months of training doing a straight linear progression right out of the book. You need to get your squat to 160 kg for a set of five. You need to get your deadlifts to 190 kg for a set of five. All of this technique stuff matters not a bit without sufficient strength. It should not take you long to get to 140 kg for a single on the squat. If it does, something is wrong. Get going. Stop telling yourself it is going to be really hard to get stronger. To go from where you are to where you need to be is not like climbing Everest. It is completely doable for you.