Idle gap seems fine. It idles ok a a good speed.
Just getting it to start is the biggest complaint.
Had another go just then.
Glow starter is fully charged, glowplug works.
Using a good fuel (Supercomp 20%)
I need a starter box as the pullstarts slips every 2nd-3rd pull but it still turns it over.

Prime the engine, fuel goings into the carby, there is 2 miniscule bubbles in the fuel line that you have to stare at for a while to locate.
prime the throttle, attach the warmer, give it 10secs to warm up. Pull away...keep pulling.. nothing, doesn't even show interest in starting...

Grab Touring car, put plug in, prime the engine, fires up first pull...