I tried six of the slotted racks when I was producing cut comb honey. They
did not seem to make any difference in production. The hives that have
them don't cluster as much on the front of the hive in hot weather as do
their neighbours with ordinary bottom boards. They might pay their way in
a hotter climate than ours, but they are probably not worthwhile here.
 
Donald Aitken
11710-129 Street
Edmonton Alberta Canada
T5M 0Y7