Heabob I'll give that a try. I've been having hit and miss success with cotton and twine. Got some silica too. I keep reading that less is more but if I use less I get leaks.
I could never get cotton yarn or silica to work properly, can't get it to fluff up enough to not flood out and gurgle.
And I couldn't get the cotton balls to work good with a 6 wrap standard coil, just something about the micro coil that works better, IDK.
It's harder to get too much cotton ball through the coil cause it bunches up, (that's why you don't wanna twist it up to make it fit).
This same setup on my RSST, ran good for 14 days running DIY Parliament VZ, 50/50 mix.
Kanger Mini Protank 2, 14 days and still going, DIY Orange Dream, 50/50 mix.
Anyvape Davide, 14 days, DIY Blueberry Cheesecake 50/50 mix.
Running clear to yellow colored juice helps. (most TPA flavorings I have are clearish or light, most FA flavorings I have are dark).
MBV/FW varies in colors, as does Capella's.
Food coloring sux.
I was lucky to get 2 days on silica, although using caramel, butterscotch, & buttery nipple juice, (some darker colors too).