IMO, and probably most folks, gathered end hammocks are more " fiddley," both to hang and get the underquilt adjusted. The Wooki is about as close as you can get to a fiddle-free UQ for a gathered end hammock. However, with a Blackbird (either regular or XLC) you still have to get the hang pretty close to perfection to minimize that calf ridge issue.
Now, you mentioned trying a Ridgerunner. If you want the easiest hammock to hang that's it. I've hung it foot end high, foot end level, and probably foot end low and it's just comfy every time. I'd strongly recommend a Ridgerunner-specific underquilt if you want to maximize its ease of use. Warbonnet's Lynx, UGQ's Ambush, Loco Libre's new Ridgereaper, and Arrowhead Equipment's Ridgecreek and Ridgecreek XL (Climashield) are all designed specifically for the Ridgerunner. Never had "shoulder slip" with my Lynx. (You also may not be aware of this, but an UQ designed for the Ridgerunner is about four ounces lighter than a similar temperature rated full-length UQ for a gathered end hammock.). Plus there's zero calf ridge.
Warbonnet has a great "try it and if you don't like it send it back for a full refund" policy. Details are on the Website. If you do get one get the double layer.
Good luck!
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