Has anyone ever built a C-141B vacuform kit

I just today got a 1/72 C-141A vacuform kit
from what I hear the Vacuform kits are difficult
Just wondering if anyone can give me any tips
on what to get or what not to do or any info that may help
me? thanks to you all
Lee kenney

Swanny can help! He built a 1/48 vacformed Condor.
here is the link: http://www.swannysmodels.com/CondorPage1.html