Making quick change tool post holders (picture heavy)

[stevec]

Interesting! Dave, what are the upper cams on the toolholder clamping studs for and do they bear on the round spacer with the 2 flats?
(I'm assuming the spacer with the 2 flats is isn't threaded down the main clamping post).
I think that making the dovetail toolholders would be easier than the ones you made, I'll let you know when I get a round toit