Didn't PL originally use small white zip-ties? I think the black ones were not available in the 1970's.
I want to try Sniffer's awesome wiring technique using black nylon lacing (I learned how to do that in the '80's at Naval Sea Support Center, Pacific - NAVSEACENPAC), by an old guy who told me that was the only way he learned to dress wiring because zip-ties had not yet been invented.
The benefits are that the nylon lace never breaks, the cut ends don't fly off and have to be discarded, the remaining sharp ends won't shred your fingers, and it looks cool if done right.