On our mecmar we didn't have to change anything going from red diesel to kero.Well, a few litres of Red diesel is recommended in domestic heating boilers to lube the pump, as a mobile is a very big central heating burner I cant see why it would be different, only that you may end up with some sooting if you use too much.
Mine only uses red diesel but then the nozzles etc are tuned for it.
Does kero not store better than this modern FAME red we get ?I fill up at the end of the season with red. Kero in season then. No idea if it matters