ooops - sorry. Just managed to remove the arms and found out, it should have been easier with the 'broken' clip My probelm: after the years the arms are so firm that is was very very hard to pull them off.
Yeah, (as you figured out) lifting them straight and not applying side force is best. I use cardboard and two little prybars (miniature flatbars). And these things are handy for all sorts of uses. https://www.amazon.com/Vaughan-222C...ocphy=9026124&hvtargid=pla-423451910377&psc=1
