I installed an OAK on my P43 on Thursday, after much reading on this forum. I was still a bit skeptical, but with some of my starting issues, and flame differences when my fan or heater were on, I thought what the heck. Besides, the parts were $80. Wow, what a difference! Bigger, more consistent flame, using far less pellets, and the thing is producing even more heat on less pellets, or so it appears. Oh, and since I am not sucking out my nice warm air, it sure seems to get hotter faster in the house. This leads to me turning it down, saving even more pellets.