My flexshaft attachment question

Huh. A cup bur you say? Dont know why they didnt just tell me that
at the JEWELRY tool and machine shop I went to and asked the same
question! Anyway, thanks to all the great responses and the helpful
hints. I am confident I will figure out how to use it with ease and
grace any day now. If not, you will be hearing from me again! (they
havent worked out thus far, but am determined to make it work before
I post another silly question) .

Thanks again!
Meike
@Meike
in ridiculously sunny LA, where its getting to be a bit of a bore!