This system is a tweak of "Optical illusion", 18/20 Games won from the first testings, (That's a 90% winrate!)
Procedure: Wait for a hit in dozen 2. When that happens, put 2u on doz 2, spin until a new dozen hit (doz 1 or 3), place 1u when doz 1 or 3 hit. NOW for every loss double bets, until doz 2 hits. (no progression when the doz bet with 1u hits- this will give the money back only) WHEN doz 2 hit, reset to 2u bet on dozen 2 *only*. Repeat procedure.
sry for my bad english, :S but i hope it's clear!
I've made a video;https://youtu.be/YbekW2T0vOU