[EnerPrime]

The only Fourze figuart I ever had trouble with was one mildly loose hip on Cosmic States, just loose enough that any dynamic poses that put weight on that hip tend to make him fall over after a few days. But I just use a stand to pose him in the air and it looks fine.

I admit I don't have Fire, Elec, Magnet or the Fusions so I can't say about them, but my Base states, both Meteors and Nadeshiko are all great with not QC issues.