I've only been operating for about two months but very soon after startup I would find a "puddle" of tar accumulated around the top of the boiler tubes when cleaning the boiler. Definitely not acceptable. I also found soon after startup that the bypass gate was a poor excuse to eliminate smoke out the door. After installing a fan and smoke hood (which works 100%) I quite using the bypass flap completely and I found the tar puddle less noticeable but still there. After taking a closer look down in the dirty hole I see tar leaking out the bottom of the bypass gate. Since I don't need that anymore I disconnected the flap control and with another similiar plate bolted the two together and complete closed off the bypass hole. Voila the tar puddle is no longer there and only dry crumple soot. There are more issues to deal with on this unit but one at a time. Thanks for everyone's comments.View attachment 116394 Well, toward the end of last winter, the cleanout handle broke off my Biomass 40 (this is my 5th break). so for about 2-3 weeks, I burned with out cleaning out the turbulators. Now I want to completely remove the turbulators and give the heat exchanges a good cleaning. Question 1: How do the turbulators come off the pin? I cannot seem to get it free. Question 2: what size brush should one use to clean the tubes? Please note my lift for removing the turbulators.