Used one Torx T3 driver to unscrew the head while holding the other end of the lugbar with a fitting precision screwdriver. Than stored everything away in a box and fitted 22mm gen-spec Rolex bars, those are a perfect fit - have read that normal 24mm lugbars might fit as well, none of my 24mm PAM-straps with tubes would fit so its on a solid 24mm shark right now which holds it well.