Yeah, don't worry, I know the gap is vital-the experiment was only over a hundred yards or so, so I can't have done that much damage!

So the gap on my top cap is not abnormal, so why should it be clunking?
Surely if clamping it down tight stops it, it must be something to do with that top cap/mount? Or could that just be a red herring? I've narrowed it down to just the nearside now, but not sure how that helps!
I'm definitely confused with this one!