There is an old post around where an SBI employee (fyrebug) discussed his own overdraft problem, and said he was reporting the issue to the engineers to try to find a solution. Perhaps this is it?Really? They supplied you with something that will alter the combustion system?
I'm also real curious to see how these look, and what would prevent them from moving around inside the tubes when installing them.Are the washers to address too much draft? Interesting way rather then installing a damper which is a no can do for an insert.
Washer pics please.
On my SBI stove, there would be no way to install them, except inside the tube, as the tube sticks into the walls of the stove on both sides. Perhaps the Stratford has a completely different arrangement. There would be nothing to keep them from flopping over inside the tube and coming to rest at an angle. Maybe that would be ok, though.How about that. Surely they are not meant to go inside the tubes. Maybe between the end if the tube and where they interface with the rest of the stove.
How much of a difference would you say there is between the hole in the washer and the diameter of the secondary tubes? Your secondary tubes aren't the same diameter as the outside of the washers are they?