Hi Robert. Not sure if this is the place for this comment, but you mentioned on your You-Tube channel some time ago that you were working on making a waste oil boiler/heater for your shop. I'd be very interested in your ideas and/or progress. I have a wood boiler currently heating the house, domestic hot water as well as the "solar room" (basically an insulated shed holding up my solar panels and housing the battery packs). Since it's heating the domestic hot water, I keep it going year round. Would be awesome if a waste oil burner would keep this thing going.