Hello:

Yes, the stack does look wonderful. I'm also curious about how it's attached so it doesn't vibrate loose.

To answer the question about "stand off fuel", the timing of the intake opening in the crankshaft is a compromise. For part of the rpm range, the fuel air mixture is puffed **out** of the carby, wasting fuel. It may be possible to see a slight haze around the carby when the engine is running, however, I always keep my face well away from the spinning propeller.

The idea behind this stack is to always keep the puffed out fuel air mixture in a place where it can be sucked back into the engine again. The engine doesn't puff the fuel air mixture very far.

I hope that helps.

Bye, Ian