I've upgraded the flasher, and installed Christo's headlight & auxilarry wiring harnesses, but have not done the indicator thing. But I wired my ARB lights up to be indicator lights as well as turn signals. I didn't need to upgrade the flasher but when I wired up my Kaymar I did so on the recommendation of a few other Kaymar owners. When I plug in my camper, I've got 6 additional blinkers per side over stock, so I wanted a little more load protection. no problems so far!
82 fj40, 99 uzj100, 06 gx470
05 525EXC, 01 XT225, 07 TTR90, 07 CRF50