Here is a shorter alternative (75mm vs 100mm).
Which one is cheaper?
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I'm guessing most of the distribution will be done online, so heck, maybe take a cue from Doughty and just bag the things. I'd rather see you keep some extra cash so you can put it toward a future series, unless of course you're going for brick-and-mortar distribution, in which case I vote big box. (Gotta catch the eyeballs on the shelf.)