That's spot on mate.i didn't think it was collapsible as it's very sturdy and strong and I haven't any experience with traps to be honest..that's a good idea using mesh to hold and protect the bait though.i have a few mesh bird feeders here I could cut down and use 1 of them to hold the bait..I will replicate what you have done and give it a go.
Do you use them for ferret food or yourself mate.