I can't help but think that just adding 1-2 leaves to the original springs could have done the job. It actually gets me to thinking that rather than flipping mine, which is a ton of work and would involve reengineering a bunch of stuff (like the shock mounts) that perhaps I should just add a few leaves to my spring under 5er and see if I can get a few inches out of that.
I wish I could get another few inches of axle spacing so I could run the 255/85R16 Goodyear Endurance tire to get another ~3/4 in of bedrail clearance and gain the capacity, but I suspect I'd have to cut the mounts off the frame and move them, which I lack the patience for even though I do have the means and ability.