A single FK control on one joint: the basic block for anything posable that doesn't need a chain or IK.
What it does
One control, one joint, nothing underneath
SimpleFK builds one control for one joint, parented under whatever it's attached to, driving that joint directly.
Nothing fancier underneath: no duplicate chains, no blending.
When to use it
A single joint that just needs a plain control
Reach for it on a single joint that just needs a plain, posable control:
SimpleFK
One joint, one plain control.
AdvancedFK
Space switching or IK/FK matching lives here, not in SimpleFK.
Exactly one joint per instance
Selecting zero or more than one won't build.
Shape edits persist
Hand-edited control shapes survive a rebuild, keyed to the control's shape option.
Safe attach to joints
If the parent turns out to be a joint rather than a control, SimpleFK attaches safely instead of nesting into the skeleton.