Sikpup
I should Work at Oakley
That's why I mention it would feel like your about to snap the lense in trying to get the arms off.Still unable to do it. It's extremely tight.
Bit of a combination move all in one to remove the earstem if I am correct, presume the same motion as the subzero earstem removal.
Push down and in on the arm while pushing up on the edge to disengage it from the lenses locking cutout. Gonna take a bit of brut force to get it over the lip of the cut.