Interesting Weber jetting

[Eljaro]

0.35 mm bleed is half the surface as the 0.50. It will probably be better than the 0.00, because when I had the 0.00 on I did get a black cloud coming out the exhaust on acceleration. The bog with the 0.5 is minimal now, so 0.35 will probably be best. I will find out when I get the jets.
Drilling 0.35 mm on a curved surface is going to be a nightmare. Those drills break just by looking at them and they are not cheap. Maybe still best and cheaper to get a set of bleed jets. I got them from http://www.dellorto.com/

[Gaz64]

You're on the money, and I guess that's how Weber decided on the final small sizes.
Sounds like 35s will fix your issue, I'd be itching to get the lids off.