since you keep using past tense, I'm guessing she isnt sweet anymore and bites now I would introduce like you should.
do the 30 day quarantin (if thats spelt right) and then i would get the all clear from the vet since the new one is also from pocket pet i think i saw in your post. I would then and only then start swapping cage set ups little by little, take it day by day then eventually put the cages near each other so they can see each ither at night but not touch each other bc remember those arms reach pretty far. this way they cant hurt each othen. then when they are both sleepy still i would introduce in a place neither one has marked theres already. if everything goes well i heard that you are supposed to seperate them from each other at night for a cupple days repeat but mine hit it off great so i left them together. THIS IS NOIT TRUE FOR EVERY GLIDER I INTRODUCED AT NIGHT WHEN THEY WERE BOTH AWAKE> JUST BECAUSE I DID IT AND IT WORKED DOESNT MEAN IT WILL FOR EVERYONE I JUST HAD TWO LONELY GLIDERS THAT NEEDED EACH OTHER>