While on the long wait for armor I decided to start making some fixings for the press studs   So started the same way as most, cut out the plastic, sand round the sharp edges, sand the back to help the glue hold, punch a hole in the centre for the stud.     Then I remembered the stud would stick out the back and not lay flat, so brainwave, bring out the old trusted heat gun and find a heat proof surface. Warm the back first just on the outside of the fixture, 5-10 s