Well Niki, yet another simple way to make knobs. Both you and Bob are such lateral thinkers. The sheer simplicity of you're method using the most basic of tools is to be commended. You're ideas and photo. shoots are just begging to be put into book form. One final comment, you're command of the English language is quite outstanding for an Englishman, let alone an Israeli who spent years in Japan and now lives in Poland!
Nothing but heaven itself is better than a friend who is really a friend. - Plautus