I sent my Big Boy to Mike to 'fix' a myriad of problems I thought I had. Well, I now call him the Big Boy Whisperer. When he fired it up, he couldn't find anything wrong. i asked him about 'blowdown' as I was never able to get it to work properly even after having watched some excellent YouTube videos. I was resigned to anemic at best blowdown. Mike's tip... Hit AUX1-6 for about a second or two then wait about 15 or so seconds...that lets the resistor build some smoke in the reservoir. Then lay on 6. Woosh....smokes like achimney. The two videos demonstrate the blowdown when the BB is stationary and in motion. Thanks to Mike, I'm a happy engineer!