Hi all, Well on the plus side I am now warm! (Whilst resting a hand on the extinguisher!!) Bought an R1 for practical reasons as the garage was getting quite cold! (Will smarten her up one day) Have had an interesting introduction to the R1. First discovered an ugly solder around the upper fastening for the handle/reflector that wasn’t visible from the eBay photos. It also turned out to be the point that failed the initial pressure test. Switched to a spare 246 base to get it going and test the burner and vapouriser and ended up with my first ever fireball despite preheating twice, which I figured would be sufficient indoors. Controlled the fireball and used it to make sure the burner was hot enough but still couldn’t get a bunsen flame. So took it apart again, got the brushes into the burner and also closed up the casing around the new bottom burner plate with a few hammer taps as there were a couple of gaps. Put it back together and after only a very small fireball managed to achieve a balanced bunsen flame. It burned reasonably well for a few minutes but then started burning from the bottom of the insulator tube and not from the burner. It does look like the gap at the top of the mantle might be a bit wide but that doesn’t explain it burning out of the insulator tube. I can’t see any blockages in the burner but something is obviously not right. I have an NOS 169 in the post anyway to add 2” to my stunted PL53 that is nearing completion, so I can try that. But my hunch is a burner problem, I just can’t find it.