I think with buckets and gravity tube your doing really good to get a quart becouse of the effects of weather and such at least down here in Pa where I am. With the high vac it puts you up in the third to half gallon range if things go good. My first year on vac I got a half gallon but it was a real good year anyway and last year I did a little over a third but it was a bad year for gravity so I was really happy. I just try to do the best job I can and whatever I get Im going to be happy with and proud of. Theron