I don’t discuss dual gears anymore. The A1 is, in my opinion, the only non-dual gear printer on the market (maybe there’s another one I don’t know about).
I really tried to question myself and was open to all ideas about what a dual could look like - tried to adapt my thoughts to all the ideas how a dual gear could look like to the craziest interpretation just to come back to my first view, the A1 doesn’t have dual gears at all: