No cnczone advice yet, but further researching indicates that a 5C collet holder is probably more usefull in my lathe. I have located collet blocks that I can chuck up in my 3-jaw or 4-jaw chuck, but I was hoping for something that would mount directly in the 5MT spindle of my 13x40 Enco Geared Head Gap Bed Bench Lathe.
I found this home built unit that is very close to what I envisioned:
and I would be willing to attempt something like that.
I also found this adapter on the Grizzly web site:
and that looks like a viable solution, although a little more complex than I envisioned, and Grizzly may not have a unit to fit my Enco lathe although I am willing to give them a call if I don't find a simpler solution.
My concerns: my solution may be overkill, there may already be off-the-shelf solutions, or I am addressing a non-issue and I should just get used to truing things up in my 4-jaw chuck.
Feedback will be appreciated.