I've noticed I rock a bit forward onto my toes when I'm doing parallels. I will say, as I've kept my weight back more so lately, and tried to "squeeze" the weight back up, I hit this major sticking point about 30% of the way back up. When I pass it, it feels like the weight is back on my quads and its smooth sailing from there. If I let my weight spill a tiny bit forward onto my toes, the squat is much easier. I know easier is not always better. I will be glad to provide a form vid at weight if need be, but wondered if anyone had this exact trouble outright.