Scooterotica

I have been looking into a carb change, running a bgm 30mm on my RT255 at the moment, i posted on other forums asking about smaller carbs but got a few emails and Pm's saying i must look in to these
Keihin PWK35-S65 (AIR STRIKER)
Mikuni TM30-8006
dellorto 30mm phbh
any of you tried or are using these

Used both 28/20 phbh on a stage 4 spec 200.