You can very successfully remove the glass with the use of a heat gun & thin blake knife. Start at the base of the limb & go out. Heat the base enough to get the knife started 7 then keep the hear on the area where knife meets glass. Rock the blade back/forth & twist slightly.. Move slowly & don't overheat. Clean the lams of glue with a scrapper & re-glue. It works best if you can use a limb shaped base for support. Hope this helps re-claim somr "lost causes".