SHB is seen as a minor issue for us in South Africa and will only be found in weak colonies. We designed our hive around the elimination of wood and launched a composite hive, as a flat pack system. We have eliminated the issues that wood bring to the colony.
Welcome, I think you have a great system started. I use plastic frames quite regularly, But I do not have a SHB problem. I use nematodes and a compacted material that makes life difficult for them to pupate around my hives. With 30 fully assembled frames per box storing new frames can take quite a bit of space. although your design may not be for everyone in every circumstance. I believe you have a winner.
Interesting concept. Have to disagree with your notions on SHBs though. Around here I don't care how strong the hive is, the beetles take a run at them. Too many nooks and crannies in this design. Eliminate them and you'd have a seller! But as they stand there are just too many places where the beetles could escape the bees. Personally I find cleaning up a slimed hive positively disgusting, so I'd never risk it at any price.
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