If they seem OK with the pouch swapping - go ahead and try a face to face introduction in a neutral space.
Many folks use the bathtub during the day time when both gliders are sleepy. Have a good size piece of fleece handy just in case they do start to fight and you need to separate them. Also have a new or freshly washed sleeping pouch on hand.
Do a thorough cleaning of the cage that you plan for them to share so it will be as neutral as possible when you put them back in the cage together.
Let them come out of their pouches (roll the tops down to expose them if they do not come out on their own) and let them sniff each other. They may begin to groom or just follow each other around.
If the are crabbing at each other or actually ball up fighting - separate them immediately and start over with the pouch swapping for several more day before you try again.
If the seem OK with each other, offer them the clean sleeping pouch. If they both go in and seem to settle down together to go back to sleep, then put them into the freshly cleaned cage you plan for them to share.
If they sleep with each other all day without a problem, they will probably be fine together when they wake up.
When you feed them, put the food in several different locations - opposite sides of the cage or one dish on the floor and one up high in the cage. This way both gliders can eat with out either chasing the other away from the food. Once you see that they share a dish, then you can feed them in a single dish is that is your preference.
Good luck. Let us know how things go.