Ah, ok. Guess the size of the tube wasn't evident from the pic you provided. But still, I would imagine the company likely builds bigger domes. Or you can fabricate your own. Surely leaving your scope outside 24/7 here in humid Florida is not going to be real good for it.
I was checking the tolerances on one of the mounts I got, and it looks like typical Chinese quality at work.
The company (Sky-Watcher) says the wobble is acceptable to them, so I guess they don't care much about quality control. I was told all of their equipment is made in China, so obviously Sky-WatcherUSA isn't as "USA" as one would hope.
I guess you actually have to buy older equipment used in order to get something that ISN'T made in China these days. Where was that rig you got manufactured?