A 'weapon' from the anime RPG Teenagers From Outer Space, the Boy/Girl Gun is exactly what it says, a point-n-shoot device that when you are hit by the beam, changes your gender from M to F or F to M, and a second blast puts you back where you started from. (for the moment, I'll avoid cases from the Trans part of LGBTQ, because I want to keep it simple for now. individual GMs choice on that!) to make it in HERO, its pretty obviously a fairly high level Transform -- it has to exceed your BODY to succeed. with an OAF limitation
The question is: is it a Major transform -- it's completely rewriting your DNA to swap your gender, after all!
or is it Cosmetic, since the only game effect is changing the (Fe)Male line on your character sheet
thoughts?