Hi all, For purely aesthetic reasons, I'd like to change the machine head buttons on an Epiphone Special II. I'm keeping the machine heads themselves as it's not worth the cost or bother of installing new machine heads on a guitar of this value. Besides, the stock machine heads hold tune pretty well since I put a new nut in. My issue is that, being a newb at this modding malarkey, I can't for the life of me work out how the machine head buttons actually come off! On my other guitars, there's a central screw that attaches the button to the shaft. I've given them a pill, but there seems to be zero play. Any ideas? Photo of machine head in question attached. Thanks, all.