OK team .. try as I may, I just can't get the CC to kick

On the plus side, we have a new exhaust pipe!! Stainless Steel no less �
I've checked the clearances of fuel needle and exhaust valve. I've "snapped" the valves shut to make sure they're seated properly and checked there's fuel getting to the vapour cup.
There's nothing really blowing out the vent hole in the fuel system flange and there's plenty of lube and compression happening.
The only thing I can really pin it on now is the gasket I made for the vapour cup since the original copper / asbestos crush ring was missing. Under expert guidance I made a flat washer about 2mm thick and annealed it well. Awesome fit, looks like it's made for the job.
My only other thought would be to hook up a jockey engine to just keep it turning so I can mess around with the fuel a bit instead of spending most of my time cranking and recovering lol
What am I doing wrong guys or is my washer, a washout??
