i have made a little modification on my thermia biomatic 20 pellet bruner , i had always the problem that the upper "duserhjul" was blocking because the teeth of the upper pinion were using.
just look at the pictures:
this works now since some months absolutly perfect , there is no difference on the burning quality . if you have any questions just ask me/ sorry that i dont speak swedish.
jeff
, any probems . I can just recommand it 
