I'm definitely interested in this idea, but have a couple of questions:

Has anyone tried using two 90 deg elbows to form an upturned 'U' instead of a cup? Seems like it should work the same and is easier to solder.

Also, do you let it rest on the bottom of the pans? I am wondering if it makes more sense to keep it suspended so the sap in the cup doesn't boil and break the syphon.