Re: Sprocket question.
honestly i know the sprocket adapters do seem to cost a bit, but they're worth every penny and then some. not only do they go on easily and as close to perfectly flat as possible but you can slide it in and out to get the alignment just right.
if you're seriously considering that hybriped, spend the extra $10 and get the adapter, and if you have to, take the chain off to get rid of the added resistance. a freewheel rear sprocket is a cool idea i'll admit, but i think the adapters are better suited for our hobby.