Hi Roy, I tend to think that if "it aint broke don't fix it", is a good mantra for these old machines... so I've just worked on the assumption with mine that if I screw it down and it tightens the steering without "jamming" its doing the job. Do you actually use it when you are out and about? I remember from my past that I very seldom screwed mine up/down back then, because it was a real pain when you dropped back the speed and tried to negotiate a roundabout!