I don’t think it is correct that an A frame is ever automatically a boot alignment issue until an on snow analysis has been made. That said, first and foremost, the A frame is an “alternating” pattern. In other words, only one side at a time, the inside ski, is negatively affected. Ther OP obviously has no problem tipping and pressuring his outside ski which is 90% of the goal of a good turn. Bad boot alignment would significantly hamper such an achievement. Secondly, because it is his alternating inside ski that shows the affected leg, what that means is he is not rotating both femurs equally, and, as a result, is not tipping both skis equally, something that will produce an A frame regardless of boot alignment. Lastly, Boot alignment analysis can only be assessed from specifically straight running a flat ski with both a natural stance vs a stance that leaves equally “flat” tracks. If his natural stance leaves flat tracks, he has no alignment issues. Therefore, it is my opinion that one of two main issues the OP is having the A framing specifically due to not matching femur rotation and subsequent equal ski tipping. That inside ski is only pretending to carve and is not contributing to the carving effort. That can easily be corrected over time with inside ski and one ski drills. While we always want outside pressure dominance, we want synchronized feet and skis.
he second issue (with the OP) is the vertical motion or “pop” in the turn. The OP is getting his timing from this pop which is why it is so deeply ingrained. This timing mechanism can be transferred to the feet and ankles, the start of the kinetic chain and at the skis where real flow is produced (not from flapping/swinging arms, noisey pole plants, bouncing at the waist, a bobbing head, nowhere above the waist or whatever may be someone’s particular issue). This vertical motion needs to be suppressed by flexing through the turn rather than extending to release, the “pushing” that has been mentioned. When we suppress our vertical motion for carved turns, we are rewarded with more lateral mobility to use for more lateral displacement of the BoS from the Com thus obtaining higher tipping, tighter turn frequencies, higher degree of turn for turn shape speed control and generating more power from the ski. The tuck turn drill is a good drill for suppressing vertical motion and finding more active feet and ankles.
It is my opinion that the OP is not carving smooth arcs and is skidding because of the above two fundamental issues of technique and not because of boot alignment or equipment choices. With the movements he demonstrates, he would get the same results with perfectly aligned boots and well tuned SL skis. Skiing with a strong two footed tipping platform with ample flexion and tension from both the feet and ankles with loose and supple hips and knees under a lower riding CoM are the goals I would apply to this skiing.
