Packed the sloppy throttle arm with small bits of foil to take up the excess play and a decent dose of lubricant so it(the foil) wouldn't grip too much on the ball and affect throttle return or adjustment. This should suffice until I can get to the shops for a new linkage.

Gylezy came around and balanced them for me using a piece of fuel line. His trick was to set an absolute baseline and work from there. Sounds simple but it isn't, I'll elaborate later. He did a fricken' good job.

I still suspect the pump nozzles are too big, and the pilots and idle screws could do with some attention. But for now, she's a road-going car packing an arsenal of carburetted datto power.