oohhh lawd,
from the very back of the memory stacks
3-tier systems is 30+30+20 at weight quoted (35 kg)
Mind you, that seems a bit low for pigs ?
until CR2 gets back from whatever sunny location (complete with beach & hot & cold running beach-bunnies) he's at...****
you may get some help from Instone Aviation, if they still exist - they used to run all sorts of wierd & woderful animal charters and I think they hold their own complete aircraft sets of livestock pens
***what am I talking about, we're freight people so it's probably dark, wet, cold & generally miserable