I'm having a problem with my fractioning still. I built a still from Ian Smiley's plans and have run it once before using his corn mash recipe. I beer stripped 6 mashes and did my first run. It also got stuck in the heads phase the first time running it at 45ml a minute. I just bumped it up like he said to 55ml a minute and it ran fine. I have made five batches of thin mash and beer stripped those and now trying to run this batch. No matter how fast i run it, it stays stuck in the heads phase. I've tried 50, 55, 60, 65ml a minute and even did one at 80. Any thoughts or help would be greatly appreciated. Thanks