OK, new question: how big is an RCH? (Sorry if this has been covered
> here before ad nasueam.)
>
> I read one comment on a web page[1] that claimed it was 1/200" (OK, for
> those who prefer fake units of measurement, that's 0.127mm).
The point is that a RCH is not convertible into other units. It's an RCH.
Luigi