Milt:
There is a coresponding angle on the seat of the female fitting for each type fitting.
Using the "double flare" risks damaging the seat......but if yours don't leak, don't mess with them.
Cary:
Terminology is a b!tch. I think it varies FLAPS to FLAPS, city to city, county to county....yada. At my house, they're bubble flares.....but I'll use "mushrooms" if that suits ya
. I'll try the camera trick, also. Can't hurt..........