I came accross this older topic because I wanted to know more about the 3th progression hole. My main "problem" is when I run the car under 2000rpm it is not THAT smooth as I want it to be. especially when I drove the car slowly for a few miles and I want to floor it it works but I feel it could be better...
Also when the car is idling you can't walk around the car without tears in your eyes... the gasoline smell etc is just too hard.
If you drill the 3th hole in it is it possible to use smaller idle jets so you could get rid of all these problems?

I was also thinking about upgrading the iginition to a magneto (now a 009 with compufire in it) to avoid these problems...
Tips and thoughts are more then welcome...