The first Carv 1 had a whole footbed that detected where you were applying pressure, had some 2D pressure sensing to some degree. But it couldn't really determine your leg orientation, just pressure.

Now there's no pressure, but it can see orientation. Installation is also radically easier. Supposedly Carv 2 is a very loved product, but I'm a bit aghast at seeing such a complex powerful sensor networking system replaced by something much much simpler.

FluxPose just launched their Kickstarter. It's not really designed for sports per se, but has so many properties that seem like they could be excellent for this kind of application. The trackers are tiny and light. They use radio so they can go anywhere, won't be obstructed by clothing. You wear the base station, which acts as a stable 0-point of reference for the system, which seems incredibly crucial for skiing, seeing compression and relative lean. It has up to 10 trackers, so you could definitely attach some to your skiis to. It works at up to 300Hz (although maybe that's with less trackers, unclear?). I don't know if raw data is available but I hope so!

I don't ski as much as I want, and I don't have the cash to throw after this product, but damn, FluxPose looks like such a huge change. I hope we see more Carv like people out there, and I hope it collides with the tracker revolution that's getting much more data. https://www.fluxpose.com/