Mark your harness with chalk or a paint pen where you need everything positioned, then take it to a shoe repair shop or somewhere else that has a heavy duty/industrial sewing machine....have them sew a line of stiching everywhere you have marked in one color for your cold water setup and another color for your warm water setup. The lines of stiching won't wear out/rub off or have any chemicals that might deteriorate the webbing like a paint pen might.That was my train of thought, I was wondering if anyone else would suggest this too instead of spending £100s on a duplicate setup.
I wonder if the paint pen would wear off from the water....
-Z