Sad... the gotoh floyd roses... no moe locking posts I heard. Wonder if Vincent brought in those with the locking posts...
Anyway... trem stability has to do with technique also. Not a lot but it matters somewhat. After using the trem, it helps to do a (very) quick pull up... or end your vibrato phrases on a pull-up. This forces the strings back in place.
Even on a floyd rose system, doing dives and just returning to pitch would leave you with a very slightly de-tuned guitar.. very slightly. So I make it a habit to end my whammy stuff with a pull up.
Of course, this doesn't matter if you don't have a well lubed nut and stuff.