Decided to go with a more natural hemp coloured breaching rope for the guns. It is 0.55mm dia. as measured by wrapping ten coils around a dowel and measuring them, barely compressed, with a Vernier gauge and dividing by ten.
The rope is home made on my Lilliputian,(more Heath Robinson!) rope walk.
As you can see the draw back is that I only have room to make 900mm lengths at a time, not exactly at a commercial scale.
Here are a couple of pics. of the first temporally installed gun, just have to work on getting the breaching laying more naturally
As for the out haulers I am still undecided whether to go with one block or two. Two blocks feel just too cramped and a single block and hook is probably factually incorrect. I had a half hearted go at frapping between the two blocks, and while it does let the blocks lie more naturally, I doubt that any RN ship at sea on active duty would have frapped ropes or Flemish coils.
Anyway its the weekend so ,hopefully, I will get some time to make progress.