There was a carburetor with a small passage on the metering side of the body.
Danged if I can recall which one though.
For whatever reason, many people seemed to be just overlooking that little hole and were having troubles with the carbs.
To me it it was no different than making sure you had the impulse hole and the intake gasket oriented correctly. Just simply look at the details, right?.
But Tree Monkey took the time to photograph and post a thread about it and thus helped a lot of people.
Whatever the project is, tractors, compressor motors, plumbing, stacking wood for better drying. you name it...
This is why I always appreciate when someone puts the effort into getting photos and posting a thread and sharing the knowledge.