The closest thing I can find (which looks pretty darn close) is at http://www.gogenlab.com/products/pyr...lling-receiver. I'm in Canada right now so I can't look a the thing and see who made it.
As to what's left in the flask? Don't know. I was only interested in the oils. It has occurred to me that it takes a long time for all the oil to be collected - about 4 hours - and that this says that all the oils aren't volatilized right away. The experiment this suggests is to see how much oil comes off in the first quarter hour, second third and so on to give an idea as to how much you loose from, say, an addition half and hour before knockout.