Dude, thanks so much! Very grateful. That's very helpful.
It does raise some other issues for me though.
Realized the different sets of arms have different shoulder pylon heights, so I'll probably have to go with Sideshow's listing, and add a couple inches, to be safe. That's not an issue though, as the height of the case was of secondary concern. The diameter is the limiting factor for the moulds.
And here too, it's not just the points of the hexagon - I didn't realize that Unit 01 sticks out over the edge of the base hexagon as much as she does. As well, it obviously depends which arms are attached to determine
how far she overhangs. I suppose the Sideshow listing is for the max option dimensions.
Since I haven't decided which I want to leave attached, I'll have to accommodate all possibilities. It's not going to look as nice as I thought, being that the base won't be concentric within the cylinder.
Thanks again!