I have a Biomass 40. I had noticed that I was getting ALLOT of coals in the refractory every time I went to fill it. It would take about 2 1/2 scoops with the ash shovel to get most of it. After reading what you guys were talking about their nozzles getting worn and letting the coal bed fall thru. I was at work yesterday, work at a food plant, and saw some stainless belting we took out. Decided to cut a piece and put it in the bottom of the burn chamber over my nozzle. It seemed to gassify fine with no issues. This morning when I went to reload before work, I was down to a few large chunks of coals in the burn chamber and the only thing in the refractory chamber was about a coffee cup full of fine ash. Does anybody think this is not good or a reason why I wouldnt want to do this?