Thanks for the report, Grizz! Good to hear of other experiences.
FWIW it was the PITA of undoing a marlinspike hitch in AmSteel that had me looking elsewhere.But I wasn't using a real marlinspike, which most likely made the undoing harder than necessary.
Side note on my securing hitch with the UCR -- only have to tie it once, when assembling the UCR the first time. The amortized effort seemed small enough.