I just wanted to thank all the contributers on this thread and forum. After pouring my own jigs for a couple years and dealing with low flow on my bottom pour pot, I read this thread. I cleaned out my pot, fluxed with beeswax multiple times, and did my first pour tonight.
It is amazing how much better the jighead looks and how much better the lead flowed. Thanks everyone! Especially Sagacious and Cadman! Keep the great tips coming.