Got it all fitted today, I was psyching myself up to take the entire back end apart, again, and had started stripping the haphazard insulation off the indicators, what? is that mains twin and earth?
So I cut that out and was left with about 50 mm of wire to work with, so I had a brainwave (or brain fart) and took the bulb out of the closest indicator, tuned it on and stuffed the wires into the bulb holder... Normal flash rate resumed with no additional resistor, awesome
The wiring on one of the indicators has been cut and spliced twice before, and I have a complete standard number plate hanger with indicators which have not had the wiring modified so I cut the bulb holder off and used the factory wiring.
The indicators had been modified to fit the holders for this tail tidy so I used it between the plate and my tail tidy which moved the indicators out and back, putting them well clear of the panniers. Wires were soldered, covered by heat shrink then covered again with the plastic tubing the indicators came with and the broken one which I found a longer screw for was also filled 1/2 way with gorilla glue.
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https://youtu.be/cTQEsyUWIXY[/video]