yeah, my gut instinct was that 60A should be more than enough for the sportster. I have quad main beams with the headlamps and spots though I was going to ditch the spots. I only bought them as I didn't realise that my headlamps did side, dipped and main beams. I'm not sure if my dipped and mains stay on at the same time or not. The engine definitely dips revs slightly when you flash which is a bit odd.
Pete, no problem with wipers and heater, I have none of those luxury items
In fact judging by the temperature of my feet and knees during the IVA test, staying warm won't be an issue, more heat shielding is needed if anything.