thanks for the info, the problem seems to be that if I run it at a slower speed the larger material does not want to run off. I change the angle and then the smaller materials run off rather fast and over the top. when the material hits the air space there is a huge puff of dust flying out ahead of the first riffle almost like an explosion. I heard that some people put about two inches of duct tape just below where the material would drop. the blower that came with the machine only has click type settings. In other words you cannot fine tune the blower. what type of blower did you have for yours. thanks for the info. forrest