Nice to see two valued contributors of one mind and replying in unison ...

Duck tape is something I'm likely to carry around with me, so I've no excuse.

I seldom do anything unless I really enjoy doing it or am almost forced into it, and in this case it is the warping of these ply boards that was making me consider correx. Thin dummies rather than fat ones.

http://www.sbai.org.uk/sbai_forum/en...ing-the-splits

Correx may be easier cut into exactly the right shape than any other material, and resist warping.

Incidently these three-in-a-box setups are in use this year with a vengence - I have three with bees in. It seems to me that the virgins in them are acting more like they do in large colonies (they took their time before venturing out) whereas the Paynes boxes (back on topic!) mated earlier. Perhaps the warmth of the other partitions and maybe the little gaps in the dividers made them bring in stores for a few weeks rather than get the next generation of bees on the go quickly.