On the topic of burr combb, I took over a hive with a lid bbuilt on it such that a two centimeter space was above the frames. At firs I houghtt this was a bad idea as the burr comb potential is great. I appears however that the bees liked he added space and when I put a flat top lid the ratte at which they filled the supers decreased. I put the original lid back and they filled better again. I made lids of the same design for the other hives and they also increased productivity. The drift of this is that in my opinion the mat is therefore a bad idea, as it would mimic the lid. (that is assuming he ma goes above the super.) Keep well Garth --- Garth Cambray "Opinions expressed in this post may be those 15 Park Road of Pritz, my cat, who knows a lot about Grahamstown catfood." 6140 *[log in to unmask]* South Africa Phone 27-0461-311663 In general, generalisations are bad. But don't worry BEEEEEE happy.