Zingit will work, but to ease adjustment, add a thumb 'adjustment loop' while wrapping the prusik. It helps quite a bit by loosening the prusik wraps when you tug on the loop. Micro cord would work too, but once it locks on the glowire, it will be a challenge to adjust. Again, the thumb loop would help.
I HATE prusiks.
Most of the Dutch gear that rely on a 'wing' of sorts to lock the cord (Wasp, Fleaz, Flyz, Stingerz etc) can be adjusted if the bite on the 2mm cord is too much. Simple matter of using a small flat blade screwdriver to gently bend the wing or antennae open a little bit.
As an alternative, you could use mini ucrs instead of prusiks. I haven't tried, but I'd bet you could use zingit for the ucr around the glowire. If you want to consider this, I can build a set to see how they work. They would hold great.
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