dogs bark, gliders crab...my opinion....forget about it.
my connor is still a crabber in pouch, as soon as he hears me outside of the cage he starts to crab, I will make him look at me and he will continue to crab until I talk to him for a minute. then he finally stops, but getting him to stop took a few weeks. I would hold him in the sleeping pouch, open it up, sit on couch. while he looked up at me and crabbed I would talk and sing to him. he still crabs in pouch like crazy. but I get him out of pouch feed him a few mealworms, pet him, let him sit on my arm. I have actually only picked him up ONCE, to get him back in cage and he didn't bite me. he actually has never bit me, but I have taken it very slow with him.
1. maybe quit the pouch training. switch to room/tent training. get a glider safe area, sit in it, you don't have to move, let/push gliders out of sleeping pouch and let them sit in room with you. At most you can offer them mealworms or yogurt drops. LIVE mealworms from petstore are the best, if they dont eat one at first keep trying, once they finally take one they should come make for more.
2. work slowly with them, try to get them to make small progress steps. again START with live mealworms, at night out of pouch, open cage door, put mealworm on a small tray that you are holding, get them to eat off it while you are holding it. DO THIS WITH A FEW MEALWORMS EVERY NIGHT. mealworms are fatty, so if everynight keep it to about 2 mealworms. If you have one that runs on wheel alot (I'm assuming you have a glider safe running wheel in the cage, this is a must have) you can feed a running glider a little more, they tend to burn off the fat on the wheel. If your gliders start taking the mealies nicely, maybe you can switch to trying to feed them with your fingers not the tray. then if that works, make them come to you if you can, start 1 inch away, then 2 inches. I shake the dried mealworm tupper ware container and the gliders come running, they now that sound means MEALWORMS!!!!!
so shake the can and give them that sound to relate to.
In the end, I would put my hand out (bravely) and make connor walk on my hand to get to that yummy treat. he would sit on my hand and eat, SUCCESS!
Tent time can also get them to start walking on you, seeing that you are NOT a predator, but this takes time, and you should do tent time as often as possible.
I have a glider room, they come out about 1 hour, run around then go back to napping in sleeping pouch.