Imran, Wade,
I do have a knob located in front to secure the clamp jig to the table first. So, this is not exactly as in David's schema.
This is the knob I purchased:
I will post a picture later today. My clamp base is about as long as the felder T Nut. I have not seen any table deformation. the only deformation I have seen is the base of the clamp digging into my piece of hardwood.
The felder T nut does not come with anything but the T nut.
Bill
