Yes to all that. These calipers seem to have a design that allows them to move within the bracket. At least that is what I have reasoned.Did you have the calliper fully bolted up during that? It gives a fair bit with the disc wobble. The inboard drive sprocket has a fair bit of eccentricity too. There's many a time I've tried to make my own alignment on sprockets and I know it's a tough old ask to get 100% when you haven't got that perfectly lathe machined piece to make it happen.
I will be using a converter to bring the 48 volts down to 12 volts.you mentioned an inverter for 12 volts? what and where?
Having a good night's rest and time to reflect upon yesterday's results, has provided better results this morning.I have a pressure bleeder for car systems. Just open the nipple and let it come out.