cool! 😮 I wish to visit Wheaton labs someday, it is a bit harder coming from the EU. Else I would hve been an ant for many years... Yeah, I was initially thinking about a 4" system but I dont need that extea finiky whatsha-ma-call-it. 8" is proven and just works, so I will go with that. My next steo in this is to build an outside J-tube #RMH but need to get the riser materials first... So many wonderfull projects, quite addictive, and each steps makes me pollute less and increases my happyness. #permies #rocketmassheater #homestead