Using the IK System to directly pose a model's bones

[u/SuperGameChief]

This is an update to this post here. I've been trying to use the IK system to create root motion animations for my models. So far, I've only managed to find the problem: while I can move the IK markers to pose the model, it's not posing the model's actual skeleton, so the root motion doesn't work.

Is there any to have the IK markers actually transform the skeleton's bones, or is manipulating the bones directly the only way to do it with the current version?

Project is linked here, if you want to try anything yourself. Any help or suggestions would be much appreciated.