Hi everybody!
I have got the same problem with my RS the second winter.
I built it in january 2016. All was perfect: the rocket sound, the heat, the steam.!
Unfortunately the last winter the stove - after 15-30 minutes of combustion - begins to send back smoke from the feeder all. It seems like the riser is not enough strong to suck the flames.!
It's very strange. The masonry is the same. THe tubes are clean....
Anybody can help me?
Many thanks