I have looked at the design of the David Eyre hive on his web site (some time ago so I am hazy on the details). It shows his ex- pat Brit. history. The basic design appears to be based on the British National which, in spite of having been designed by a committee, works very well and is used by about 80 per cent of UK beekeepers. The innovation is the ventilation system which I have not tried but is on my very long list of things to do. Chris Slade