[Marty_Escarcega]

I can still make up a couple of sets but no longer have the tightening fixture which is basically an aluminum block with a pocket machined into it to hold the tool holder while tightening it.
Price is still $169 shipped USPS Priority, for 8 holders and the special spindle nut. You have to learn to clock the holder so when you tighten the spindle nut the "0"'s are lined up.

This was a prototype run. Still usable to the right folks. Sold As-Is.
Marty

I am out of standard ER16 Collet nuts. (You can buy standard ER16A collet nuts everywhere, Amazon, Ebay etc)
I still have holders and the special nuts.
Price reduced to $159 shipped USPS Flat Rate Priority, for one special spindle nut, 8 holders and one ER20 wrench to hold the spindle nut.
You will have to machine your own collet fixture tightening block to hold the collet chuck while tightening your bits/tools in the collet chuck. Simply an aluminum block with a hole and 3 slots to engage the ears of the collet chuck.

Again, they are AS-IS, you determine their use and suitability for your application.

Marty