thank you for your nice comments. I use a premix in the tank and it has an integral filling cup that slots inside the filler cap. This is charged by opening the tap on the spigot! It also has twin drip feeders o the bottom end.
Carl, the longer plugs you recommended have transformed starting, if it’s dry tomorrow it’s off to Kempton with a yowl.
Scotts recommended 14mm short reach plugs KLG or champion L7. If you use a long reach 3/4″ it protrudes 0.26″ through the head and the threads clog up with carbon. This can cause problems when you come to remove the plugs and may even strip the threads.
I have used Champion L88A or L90 short reach plugs in my 1949 for the last 25 years without any problems, I buy these from The Green sparkplug man at Autojumbles for about £3 a pair.
Best wishes Ted.