@David Chan what you should feel is with toes lifted or heels lifted compared to flat.
I don’t feel those things with quarters (up to 4). My arms were always forward when femurs parallel to the floor because of LeMaster (reference above). No struggling for balance, or off balance, up high to low.
I did the test in the skis and did not notice any difference compared to the floor. I am not aware of any of my skis having a ramp angle.
K2 CTI 80, 2017/2018 Volkl FIS 165 & 2018/2019 Volk FIS 165 both with race plate. They are stock so I thought flat. The boots are 12 degrees.
When flexing I think my kneecap is staying at the same place above the boots. I think my hips are also above the skis in the same place i.e. that a plumb bob off either hip would end up at the same place on the floor with me up high or low.