Hi all. Just thought I'd post up about a little rocket heater I had made from a 4" gate post I had for free. It was around 5ft long so I had it cut at 45° 2 ft from one end and welded back at a 90° angle then had a gravity feed tube put onto the horizontal pipe.I had some plates welded to the Base to keep it upright and off the floor. It burns a treat and because it's 3mm steel it gets plenty hot too. I burn wood and drip feed old cooking oil in it and once warm is pretty much smokeless.