Do you use frames in the boxes, when vacuming?
yes
How does it work. ie. dead bees?
Works well for me and for others from the feedback.
Does it need to have a slanted bottom?
probably not, but just like with cars, it is not the high speed that kills, it is the sudden stop.
Thanks this is exactly what i was thinking about building and am wondering how it is working.
Check the comments ->
http://robo.bushkillfarms.com/beekeeping/bee-vac/I also believe some have left postivie comments in threads here on the forum if you search.