I'll just throw this out there - that on the long search for the most OS buzz - I started using C-Glow MD4's and they (to me anyway) feel a LOT like a buzz and fly with more confidently OS but not too OS, once they work in they fly like the Fresh glow Z Buzzz or new Ti Buzzz and they hold that stability well. So far I'm pairing the MD4 with a lightly seasoned Z Buzzz and they work great together.
Yes the Buzzz/Glow MD4 is a great combo. . but after i got my FLX CryZtal Buzzz i don´t feel a need for the MD4s anymore