Chris, can you explain the reduction in charging resistance? I don't quite understand that, I thought that was purely a product of the battery's internal resistance?
The only reason I thought it would work, while not being ideal, is that the xrr service manual shows some schematics that are similar; dc and ac system from the same coil. Or so I thought, looking at again there are two coils. However, these wiring diagrams are obviously not of an xrr so who knows what the hell thats all about?
I think in theory you could have an ac light, and still rectify it for a dc system. However, there wouldn't be a need for both ac reg and a reg/rectifier, because only one of the regs is going to be doing its job.
It would be simpler to just go all dc.