Just tried it, and the Spline IK is a very good addition. Note that the important part in step 5 is to replace the XYZ position sub-controller with a path contraint (or use a list controller like seen in the image). He probably started to write that, but then jumped ahead to the bezier float. Or maybe that used to be the…
@Noren Thanks for the confirmation - If I understand you correctly - should it look something like this?: On another note, i am also seeing something, that I did not intend for and I have been unsuccessful in figuring it out. The 'Motion Paths' show, that the IK Chain (Green), and Bone (White) Paths do not follow exactly…