#1 Sylvie thought it would be fun to see how far she could stretch my sunglasses. She did not give a report on the extent or quality of the fun, but for me there was none.
Since I cannot easily acquire a new pair, I drilled a hole in both pieces and used a piece of finish nail as a splint to put them back together. They don’t seem to fit as well now.
#2 At home bending two teeth on my chop saw blade would lead to a trip to Home Depot. Since an American Home Depot is my quickest source here too, I used my angle grinder with a cut-off wheel for a double extraction.