I'm really wrestling with the whole concept of how lateral balance in skiing should be tested and what should be considered "in balance".
My consternation stems from recently having new custom footbeds built and from the concepts coming from Eric Ward's Shim Balance System.
Part of the alignment process during my custom footbed session included some "static" balancing maneuvers while in ski boots. They tested my balance while lifting one booted leg and standing on the other. I was told to keep the lifted leg hanging to my side. Well surprise, surprise I fell over to the side of the lifted leg. They then proceeded to put varying degrees of cant strips under my stance leg until I could mostly balance well on that leg (ended up at 2 degrees out on the right and 1.5 degrees out on the left). Then I was given shims to "play" with on slope to see how the canting felt.
So I'm out on the slopes with the cant strips in place and I feel like I'm in an eternal snow plow. I'm always on my inside edges when straight running. I removed the strips after a few runs to get back to "normal". Later at home I tested what the cant strips felt like standing on my wood floor. With the strips in place I felt exactly what I felt on the mountain - that all the pressure was on the medial side of my soles.
So I have to question this process. The more I thought about it the more it doesn't make any sense to me. I don't ski with one leg in the air and I don't think that really proves anything about balance. What I think makes more sense would be the use of a digital pressure pad (or something like that) to determine how well the pressure is being distributed across your boot soles after canting (and also the custom footbed).
So I think I read that Eric Ward uses a digital pressure pad, but also espouses his SBS solution - built on the theory of dynamic balance. Well the whole idea of dynamic balance seems very similar to what I had done already, but without the fancy machine SBS uses. Maybe that machine makes all the difference though and I hope Eric (Mosh) responds to this post since he didn't respond to my email message. However, he does present an at-home self-test method which is completely similar to what I have already experienced. If you do his self-test you can then purchase the appropriate in-boot shims to apply the necessary correction.
So I'm now thinking that it would make more sense to test boot canting adjustments by including our skis in the testing. I'm envisioning a process where a skier stands on a long foam pad while in their skis and a digital level placed on the skis checks whether the ski is sitting flat. Of course the level would have to be calibrated to the skis and pad without the skier on them first. Is there any validity to this method? Does it already exist somewhere at some shop?