Float level Zenith updraught Carburettor

[john williams]

I remember an article in the "Grey Mag", a few years ago, written by someone from Holland, on how to measure the float level on the Zenith updraught carb'. I have searched all the Magazine Index, but can find no reference to this article. Anyone recall the article? I cannot get my float level correct by trial and error, and washers under the needle valve.