A couple minor things -
1. Open your hips slightly more at the top of your extension. Think shoulders behind the hips, and use your glutes to get the hips open all the way. Let that bar rest against your hips as you finish that pull.
2. Smooth out the transition from first to second pull. I assume you're taking the first pull fairly slowly intentionally (which is a good idea at this point), but you slow down a bit before you initiate the second pull. Keep pushing w the legs throughout that transition and just go.