If I could move south I'd have done it years ago!
I normally clean mine out at the end of the year only. Last year I sent 5.25 tons through it ..... lots of flyash, but there was plenty of room in the pipe to draft. The way I attach my pipe to the chimney, it's a royal pain in the ass to remove, so I only remove it at the end of the season. I think with the coal I'm burning this year, there will be even less ash. We shall see.
Dial is at 1.25 turns out for the warm day today. Lately I've been keeping it at 1.75 turns for a real hot burn. One night I had it open 2 turns!