This is 12 numbers bet, or 3 quads.
Procedure: For each hit in column 1 or 3 bet the unhit part of that doublestreet hit with 1 quad. Repeat procedure until 3 quads are bet. When 3 quads are bet, start a 12 numbers negative progression starting with 2u until hit.
2 3 4 6 9 14 21 31 47 70 105 158 237 355 533
First tests was played with 1u bets.
Highest step in progression was step 10 (70u)
Required bankroll 500u, playing with 1u bets.
Wingoal +500u, stoploss -500u