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.nastyYou can switch between boots if you want. You could switch out the CAST-made AFD's on the toe piece when using each boot if you want which isn't too hard and only requiring a 3mm allen key. However, I have mounted a few CAST setups where the customer had an alpine sole and a gripwalk AFD which worked fine. It still made contact with the AFD and passed the toe height card test, although I won't say it's "legally" acceptable and would pass an actual twist/lean test.
animatorI’ve tested alpine boots with both the GripWalk and WTR AFDs and none of them passed a Vermont calibrator test for what that’s worth. Every boot sole type with its respective CAST AFD (like alpine with alpine, GripWalk with GripWalk) all test out perfectly, but mixing and matching has not ever yielded a pass on twist/lean for me.
.nastyYeah I figured as much. The ones I've mounted for people just waived their liability so I didn't bother even testing them.