This may sound smart assed but is not, Have you considered how to deal with your carry method when you have to take a crap in a public place.
Any other rest room use can be accomplished by simply readjusting your clothes but, to take a dump you have to actually drop all below the wast carry methods on the floor

Open carry is a pain in the butt, the only place you can conveniently carry up here is in a low slung leg holster, because of winter coats and jackets, That also is the fastest place for most of us to draw from.
That is also the area that takes the most abuse , I even broke a grip splitting Kindling, I was choked up on the ax handle, the extra handle whacked the wooden grip and split it

Made a new one the next day at work at T/C Arms

I'm not saying don't, I'm just throwing out experience

Which reminds me,
Shoulder rigs, Does it anchor on your belt ? Does it use a solid loop, Velcro ? Some other type of "quicker" disconnects ?
At the age some of us have reached, just taking a "nice healthy" is stressful enough with out adding the menace of being hung in our carry system
Before you laugh or blow this off, think back on how often we have heard about N/D's in restrooms ?