Uglysquirrel wrote: ...2-3 times a season, lift the grate and vacumm the fines out.
I only know for sure about a Koker, but when I take the grates out of mine, it's not an incidental job. First of all, they're cemented in there and are difficult to get out. They don't "lift out". Then to reinstall them, they need to be cleaned off, and recemented in place. I can't have any air leaks in the joints or I will end up will hot coals where I don't want them. On the Koker, removing and reinstalling the grates is a once a year job and I suspect it's the same way with your stoker.
However, the good news is, you shouldn't need to remove them during the cold season.