optimus123 loginThank you for the numbers @Doc Mark,,, certainly a clear difference at that low end of the BTU scale…It is pretty difficult to find a legitimate grumble with the Svea 123(r)… AsI have found that uprht stoves like the SVEA 123, and the Optimus 80 warm up faster, and boil water faster than the Optimus 8R. My opinion is that the uprht burner has a