This is 13-14 number bet, FLATBET.
Procedure: Wait until 1 out of 4 of these groups of the same color hits two times in a row (not necessarily in sequence) then bet the 3 unhit groups for 2 spins, then STOP.
BLACK GROUPS
A. 2-4-6-8
B. 10-11-13-15-17
C. 20-22-24-26
D. 28-29-31-33-35
RED GROUPS
A. 1-3-5-7-9
B. 12-14-16-18
C. 19-21-23-25-27
D. 30-32-34-36
Played with 5u bets,
4/5 Games won
7/10 Games won
Thanks Ig, there is something in those groups and sometimes they cooperate...
Many of your ideas are playable for sure!