Hombre,
I know. But the TBH mob do OK without side and bottom bars and the unwired is cheaper (as I intend to change foundation more regularly) so I will find if it is cost effective! I have the experience and confidence not to let it all fall out - and if you drop a wired frame it suffers exactly the same, so nothing new.
Brood nest needs to be the same temperature, so a really full frame of comb will be the same temperature in spring as on a cool, or hot, summer day. If it is not a viable proposition, the suppliers are supplying items 'not fit for purpose'? I don't think I will be complaining. After all, there is plenty of space in the Dartingtons, which is where they will be going, at least initially.
Regards, RAB