Thread: Bevel setting issue in the middle

Here I am again
Finally managed to have an even "wave" in front of the edge on the 1K.
It also pops 1 hair on the arm at all 3 points.
Also the TNT feels smooth and digs in. This make me THINK the bevel is set, however there is no undercut, only the "puddle" of water moving evenly.
So when is it ok to proceed to the next shapton stone? I've read and watched a lot and there is the undercut and there is the "suction" feeling that should tell the progression.
Are both indicators required on the 1K or at a later stage?