Make a gizmo tool to delete IK bone.only FK bone in the rig

Uploading: no ik_1.mp4…
I am a beginner in making animations.
I used a rig tool that was kind of like autoxxx pro.
It looks great. something like “FK snap to IK”.
but it needs to spend a lot of time to move ref bone here and there.
When you need to make a thousand toys, you’re in trouble.

I try to do this with a gizmo tool. Only FK bones in the skeleton.

no ik_1