Thanks for all your comment of plastic feederbags. I built a holder frame ti acce pt the feeder bags without squeezing them. Found that many bees go into the slkits and consequenlty died there in. New season the cuts will be tiny, I think that an X-Acto double edge point will probably work better than the razor blade. DO you put yur slits in before or after installation in hive.?? Looking forwadt to your replies