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While I agree with Oz, and I would not challenge his wisdom gained through time,
I think of a perfectly centered edge this way: my kamisori is honed on one side only (at an angle), and it shaves...

Tape can be a PITA if you dont standardize how many layers you use, and you forget the next time you go to touchup. I gotta remember to start that honing diary...

Taping is not affecting it that much.
The way I think about it is that there are many blades with the same thickness spine which have different width blades, and vice versa. There is no standard...

If you are worried about the spine you could always tape.
5 or 10 per side is not excessive IMHO. we are talking microns of wear here.