My 2 cents worth Chris.
If you want scale rope, try ship model building supplies. The string you buy for rigging is very good, and doesn't seem to go "hairy" when painted like some thicker cottons, etc can do.
Never thougt of cargo net before, but hey, with all the scrounging crews did I'm sure it was probably used more than once for sure
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Looks a nice build. Your brother should be real happy on the big day. I remember doing a Tamiya Virago Motorbike for my brother 15 or more years ago; I built it the same as the one he had then. He doesn't have the real one now, but he still has the kit in his display case
Hope your bro is that appreciative of your efforts.
Happy Modelling
Peter