Was that Shaun with the jumbos - not sure if he came across to the new format?the extra deep frames remind me of someone from this site, up the Kapiti coast I think? who ran "jumbo brood boxes", and they worked well for him. They might have been 5/4 size?
The spacer at each end idea addresses some of the issues with getting frames out, but as @tristan says they could still get fairly sticky sometimes.
It will be interesting to see how it goes once he puts bees in it. I can't see why this system won't work for him, looks like he's had fun experimenting and building, so no reason he won't be able to address any issues if they arise.
I like that he says it's only really relevant in environments with long and extremely cold winters - so no need to look at this approach in NZ as the problem he refers to doesn't really apply. Nothing wrong with having a go with this system in NZ either, I'm too lazy to do it though
But 100% of hives survived varroa.. My mentor call here such beeks ( of course we are not exception of it) - beehivers, not beekeepers.. Some don't know difference between worker brood and drone brood and " gave me lessons" in beekeeping.. I often ended in disbelief.. and usually just nod with head and look to go away, cause I believe stupidity is contagious..That fella - vino farm..
Lost all his hives bar one. Varroa were the main culprit. So changing the hive design won’t correct that issue.
I love that on opposite sides of the world, the same terms develop.My mentor call here such beeks ( of course we are not exception of it) - beehivers, not beekeepers..