I believe this is a good system.
Procedure: Wait for a hit in column 1 or 3 within dozen 1 or 3, then place 3 splits + 2 DS . (see video!) Stop/Restart when any of the splits hit.
link:s://roulette-simulator.info/game/37b1aaa93e9afa512d2e9b786db91b10 (link:s://roulette-simulator.info/game/37b1aaa93e9afa512d2e9b786db91b10)
Progression 1 1 1 2 2 3 4 5 7 9 12 16 22 29 39 52 69 92