link location?

[Freedave]

would someone please post a link to a picture of bokakobs elliptical slant plate reflux column. the one that has both plates cut and soldered into the column tube. I've looked at the page or two on the parent site that has a number of his other designs including the one with one plate cut in and the other soldered to the bottom of the condenser. but where is the classic two elliptical plate design?