I took pics to demonstrate how I loop scrunchies together in order to stabilize the nasal pillows on my Hybrid. WhiteBeard came up with this fix (viewtopic.php?p=280295#p280295), but I've amended it for myself, as I don't need the scrunchies on the sides. My version results in small terrycloth scrunchies that loop over the Christmas tree net clips and, when pulled upward, form an upside-down V over (around) my nose; I then catch both of those loops with another single scrunchy, then catch that one with another, and so on, until the string of scrunchies reaches the top strap on the headgear.
Here are the little scrunchies I use (found at the dollar store), next to a dime for size reference:

This is a little blurry, but I wanted a closeup to show the "knot." Here they are when they're looped together:

For purposes of illustrating the looping technique, I used larger "standard" hair ties. Here's step 1:

Step 2:

Step 3:

The result in this last photo is the same as the one in the second photo; this one just isn't pulled tight enough to form that nice "figure eight" you see above.
Hope that helps!