I wasn't able to figure this out from the pictures: how do the zippers of the DangerBird and RoamingGnome compare to the WB Blackbird? With the Blackbird I like that I can close the zipper at any place I wish, e.g. directly next to my shoulder to make it easy to adjust the underquilt. Is this the case with the RoamingGnome, too? And how about the DangerBird?