we have 10 glider to cut nails, so I know how you feel.
two best methods we have used, both with 2 people.
1. using the pouch with the hole. Put glider in pouch during daytime, sleepy time
let glider get calmed down, sometime our gliders take awhile to start to nap again. then cut the nails with treats sometimes. the biggest problem with this method is they like to look for treat out the small hole so I can't pull a leg out, and other times if they won't settle down its hard to find and pull out a leg.
PICTURE AT BOTTOM.
2. if bag fails, (last time we did it at night during playtime and some wouldnt settle down in the bag.) My wife just grabbed the glider strong, fingers around backside and thumb under chin, with one finger over head. this prevented the glider from moving and being able to bite/nip. (most of our gliders only nip on occasion only one will do a blood bite) I pulled out a leg/hand and held it steady so no pull back and the wife cut the nails. But you must be able to hold the glider strong but not hurt it also. They didn't like the cutting alot, but come back to us quick to check for treats and the experience did seem to scare them from us.
I took sandpaper out of wheels for now, doesn't seem to help much BUT YOU ALSO NEED TO CHANGE THE PAPER OFTEN as it gets wet from pee and poo.
that's what I got, 2 PEOPLE, holding so they dont move or bite.
Just be glad you only have ONE!! is that 14 nails to cut, I got me some 140 nails to cut soon.
HERE IS AN INTERNET PICTURE OF THE WAY WE HOLD THE GLIDER FOR NAILCUTTING, AND WE DO IT IN A STRONG BUT NOT STRONG ENOUGH WAY TO HURT THEM. after cutting they just walk away or stick around for a treat.