It looks like the original spindle chuck retaining assembly is gone. The knurled ring is there and some sort of spacer, but the chuck was a plain jane mt3 adapter with a Jacob's mt2 chuck in the spindle and popped right out without having to remove the knurled ring.
I am most likely going to use this for milling, as I have a decent drill press, and will be employing a ER32 Collet system. I would like to machine something to replicate and stiffen the collet to spindle. If anyone has some dimensioning on origininal retainer assembly or a link to that information, it would be much appreciated. I'm sure the MT3 interface would be fine, but imagine some extra holding would be better.
Also will be fabricating a new lighting assembly / cover. Pretty simple layout to employ some newer LED technology and light the work area. Open to ideas.
There was also a drain port and hose already mounted to the table and opens the possibility for some active cooling.
The more time I spend looking at this, the greater the possibilities seem.