Almost half of my cases are Gator ABS cases, or badged equivalents. Gator traditionally used a generic Chinese-made OEM case which I've seen sold under several other names with a different label on it. However they may now have branched out into more bespoke products as they also do ATA clasp cases, though I'm not sure if they are any more rugged. And they also do slightly longer than normal cases, which i haven't seen elsewhere, so they may now be a big enough company to have their own exclusive cases made.

A lot of the rest of my cases are now Thomann ABS cases. Very similar to the Gator cases but cheaper. The rest are either the stock Gibson case or Hiscox liteflight cases, one TKL ABS case for a bass (very like a Gator), and one old-style thick cardboard case for the Flying V as a decent shaped ABS case was far too expensive.

None of my guitars are going flying. If they do travel it's in the back of the car being packed and unpacked by myself.

I've certainly made a few adjustments to the inside of cases to get the guitars to fit snugly. Mainly in terms of the neck supports so the neck is supported along its length and the headstock isn't touching the floor of the case.