I have that Gator case for an Si Ex3, first case had the bottom brace for the doghouse inserted completely off and the staples were exposed, as well as having a couple of foam pieces fall off the nose cone and upper lid.
I returned it to GC and the replacement was better, but then:
1. One of the casters did not align at first, but with a fair amount of torquing, I managed to get it installed.
2. The foam on the tray along the sides of the console do not hug it completely along it's length, leaving thin wedge-shaped areas where the foam diverges from the console from back to front (I have photos if anyone wants them).
When the nose cone is installed and the top cover fastened, I don't perceive any rattling indicative of a loose console, but the questionable fit as well as the weight (at 104 pounds, it's 12 pounds heavier than my much larger GB8-40 case by Jan-Al cases) makes that $500 price a bit hard to justify.