Join Date: Apr 2007
Location: Powell River British Columbia, Canada
The only disadvantages I can see to a smaller bucket are less room for the chips to drop out of the air swirl, and of course, less room in the bucket, so you have to empty it more often. I have my DC set up with a Rubbermaid garbage can for the cyclone stage, and it seems to work quite well.
There is one issue that you may want to look at, and that is how many elbows or 90 degree turns you have in your airflow. The fewer turns the better. You lose a little bit of pull through each turn.