Sub-20 with 20 ZZ "Variants"

winter variation, oll/pll, zz-b, eoline on left, zz-d (porkynator approach), zz-rainbow (my variant on zz-porky), eo-cross, eo-petrus, zz-tripod, zz-columns (my variant), zz-z (rotation), eo-roux, zz-lbl (co,cp,ep), rotationless f2l, non-matching blocks, xeoline, zz-a, ocell/cpll, color neutral (about z-axis), coll/epll ... https://www.youtube.com/watch?v=VLObmp6MWRo