My first thoughts were to automate changing the R8 collets which would be hugely useful as it's a PITA to change them,
But then I see tormach TTS - appears to be a good design and holders don't appear to be too expensive
I also see TTS style 3/4 collet chucks on ebay - but seem to be lacking the wide collar that I think is used to get the correct Z height?
https://i.ebayimg.com/images/g/mqkAA...C1/s-l1600.jpg