Is it possible to access the animated Channel Prims in APEX rigs (within our character's Base.rig)? I'm thinking for uses like finding a transform animated at a different time, eg to look ahead for an auto-stepping rig. It looks like the "ch" APEX nodes can find the value at a chosen time, but I'm not sure how to get the channels, or if it's even possible.

That's not currently possible because the channels are first evaluated before being passed into the rig. I think that there would need to be some infrastructure to support something like this. Some sort of convention to be created where the rig is also given the animation channels in addition to the values at the current time. Please log an RFE so that we can mull over this. Thanks!