I am considering assembling a two queen tower system
(a la bjornbeeapiaries.com unique beekeeping) I use a top entrance which I think will still work. I can modify the queen excluder. Is there any more info I should be trying to find?
(http://img202.imageshack.us/img202/82/260beepictures161.th.jpg) (http://img202.imageshack.us/i/260beepictures161.jpg/)
Uploaded with ImageShack.us (http://imageshack.us)
(http://img804.imageshack.us/img804/2844/260beepictures243.th.jpg) (http://img804.imageshack.us/i/260beepictures243.jpg/)
Uploaded with ImageShack.us (http://imageshack.us)
Photos from Bjorn apiaries.(Buzzbee)
A top entrance is fine as long as the drones can get out of the brood nest. Which means a minimum of a 3/8" hole between the drones and the outside. They can't get through the excluder to go out the top.
Thanks Beemaster for posting the photos. I will ensure that the top entrance is at least 3/8" maybe 1/2".
Interesting and would like an update on this.