I dont understand the need to make more work for myself when my methods are fine.
Ely, If that works for you, good.
Personally my crownboards are a simple sheet of 10mm ply and no feed hole.
Like yours, the bigger format rarely needs feeding in the spring (and certainly not during the winter), so why bother with feeder holes if they are not needed? Insulation sheet sits flat on the crownboard. There are advantages of top bee space!!!
Mine either over-winter or not - it's not generally a matter of stores shortage as long as the bees (or the beekeeper) are able to ensure the box is full of stores in the autumn. A large box means thy can be left undisturbed for that much longer - a huge plus compared with those that are endlessly (and needlessly?) fiddling with their colonies throughout the winter and early spring.
Ely, If that works for you, good.
Personally my crownboards are a simple sheet of 10mm ply and no feed hole.
Like yours, the bigger format rarely needs feeding in the spring (and certainly not during the winter), so why bother with feeder holes if they are not needed? Insulation sheet sits flat on the crownboard. There are advantages of top bee space!!!
Mine either over-winter or not - it's not generally a matter of stores shortage as long as the bees (or the beekeeper) are able to ensure the box is full of stores in the autumn. A large box means thy can be left undisturbed for that much longer - a huge plus compared with those that are endlessly (and needlessly?) fiddling with their colonies throughout the winter and early spring.