Hi Squildjian, Cymbql,
Exactly! About the balancing, I only found this out recently, after I had the same irritating experience.
Especially when you are playing the cymbals really loose between the felts! (which I do)
Normally it would not matter so much, but with the rivets in a sizzle cymbal you really do not want them sitting on the lower edge.
Having said that, my Zidjian 19" Armand Beautiful Baby Ride keeps the 3 rivets nicely on top, I wonder if the "zildjians" looked into this during manufacturing.
This cymbal is one of my all time favorites, and I only bought it 6 weeks ago for a dream price!
One more for Cymbql

, Th Paiste's 101, 201 and the PST 3 series are all brass, no bronze.
Cheers and Happy Drumming,
Harry