Having fibro also, I know exactly what you mean. We don't have the same strength as those with healthier muscles so quilting is challenge for me too. I've been thinking about getting the Supreme Slider too but think I'll try the oven liners first so thanks for that suggestion to the poster of that.
I do use good quilting gloves (don't have the Machingers, which I've heard good things) but when those don't help, I've used finger cots which do help a lot. however, the pressure on my fingers makes my hands hurt faster.
The best thing I've found comes from my old secretarial days. It's a glycerin-type salve similar to this stuff.
https://www.amazon.com/Sortkwik-Fing...=tacky+fingers
I rub it on my whole palm and fingers and keep re-applying it as needed. It gives my fingers / hands enough tacky feeling to hold the fabric. It doesn't leave a residue either. I know it sounds crazy but it does seem to help.