Hi Drake.
What you have mentioned isn’t possible as it will create a dependency cycle.
The Mesh is controlled by the Armature, so the Armature can’t be controlled to the Mesh. (Chicken or the Egg.)
I think what you are asking is can the IK control be snapped to the FK controls (and/or vice versa).
Yes this is possible, however, I did not build this function into the rig. I will at some stage in the future but with my current ‘to-do list’, who knows when that will be. (I certainly don’t haha)
It is possible to do some manual snapping by copying and pasting the visual transforms but it isn’t a straight forward process in many circumstances.
Sorry I can’t be of more help right now.