Main Fuel Screw and Idle Speed

[ally406]

Everything's nice and free, it's an 80% veg 20% misfuel blend.

Thanks for the advice, that's the fuelling wound in as far as the idle adjustment allows. Getting 20psi at 3,500rpm with not much smoke at all. Needs more fuel which will probably involve bumping the throttle arm round on the shaft, but that will be for another day!