Exploring and re-furbishing an 8r [bought as a 'needs work' project stove] at present. Separating the tank / burner joint required a trip to the bench vice. That joint was very tight. Tight as in, a correctly fitted wrench was rounding-off the hex. Fortunately the threads appear good. Now I'm at the re-assembly point. Finger tight finds the burner assembly with the control stem pointing downwards, the 'six o'clock position' when viewed along the axis of the tank/burner joint. By the time the control stem reaches the 'seven o'clock' point things are reaching 'hand tight with a small wrench' Now I'm no 'man of steel', but the 90 degrees needed to bring the burner round into position feels like it would risk serious damage to the parts. Do I back off and use teflon tape a turn earlier? Am I just being a chicken? Do I take the blowtorch to the tank to expand the relevant female threaded part? I know it is difficult to quantify these things [the number of search returns for 'taper tightness' demonstrates that!] Does anyone have rules of thumb they would like to share?