For the future or anyone reading this, any time you are removing a binding screw if it doesnt come RIGHT AWAY some heat will usually break the bond
if you used epoxy it will probably need heat or if you didn't do the instal you don't know what glue was used so give it some heat
the trick is remembering this before you fack the screw head up which i have done even tho i know better
those particular dynafit Torx ( ? ) screws were more problematic than PZ screws as i remember and i would use heat just on spec