Just received a new-to-me Optimus 182 from mail yesterday. My intention is to prepare it for actice duty (of some level) to be used in our camper truck some day. The thing needs some attention to work nicely, so I'm here to get some help. I have purchased some washers and small things from the Fettlingbox some years ago. They are meant for these kind of burners, I think. But now I'm having trouble tightening the burner back with a new washer. Is it normal that the nut has to be screwed really really tight before the burner gets in contact with the riser tube? I'm using Washer NAB02 and it feels a bit thick.. This stove seem to have Radius burners, so it's not original. Are there any known compatibility issues that could cause this tightening issue? In addition to that problem, I'm going to need a tool for removing the NRV from at least another tank.. Now I'm off to lend my friend's ultrasound washer. Maybe that'll get the juices flowing a bit better.