The problem with keeping universal expansion and attributing galactic handedness to universal rotation is that even with the rotation and the poles of rotation lying outside what is observable, if the "universal coriolis effect" held, at the "putative position" of the polar areas, there'd be an overabundance of one handedness type over the other at that position (the coriolis force being at the max in those areas). Handedness, as I've said previously, mightn't be a good criteria for defining any geometrical aspect to the universe or to its constituents.
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