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(Philippe Habib) wrote in message ...
I think I get it enough to make something that will work one of two ways.

1. turn a round pin that fits snugly into the hole. cut a slit into the
portion that goes into the hole along the long axis. Have a setscrew at
an angle to the slit that will force the slit open and make a tighter
fit.

No.
The pin just fits loosley into the hole in the "round thing" as you
named it.
There is NO need to have a slit in the pin. There is no need to have a
setscrew in the pin.

Gosh, I even took it apart, and took pictures of it. What you can't
see in the pictures does not exist.

2. Turn that same pin and also make something that will fit around the
part that goes up and down with the quill. Draw the two together with a
screw so the pin can't move.

The part that goes up and down with the quill is what you nicnamed the
"round thing" I have been very carefull to consistently refer to it
like that.

The piece that wraps against the "round thing" is just a peice of metal
with a v-notch that approximately matches the "round thing"
We'll call it the V-block.

The V-block is what attatches to the DRO slider.

There is a screw through the V-block to the end of the pin.
The pin will be pulled slightly crooked. That's OK!

The screw through the v-block, into the pin is what draws the
V-block tightly against the "round thing"

The pin just has to Just sort of fit into the "round thing"

The V-block will line up with the "round thing' because it is a
V-block. The Pin is used more like a claw, to grab a handy hole
in the "round thing" and hang on.

You do NOT want to try to use the pin to attatch to the DRO slider.
It is too hard to MAKE IT wnat to be lined up.

Teh V-block will naturally line up.

In either case, the moving part of the dro attaches to that pin.

NO. see above.

If I still seem like i don't get it, a picture would be great.

I took it apart, and took all the pictures I could think of.

Whatever I wind up doing, I'll photograph it and put it in the dropox for
the next guy.

You are welcome to re-format the pictures I took.
I didn't know how many should have been needed, or how much resolution
was appropriate.

I'm not sure what else to take a picture of...

Maybe these words will help to make it clearer.

It's much simpler than your last post describes.

Hope that helps.
Pete