Alright, this is 10 numbers FLATBET. (Need help testing, more testings is needed!)
Procedure: Always bet the two unhit dozens with 5u within each dozen (10 numbers bet) CHECK the two last numbers hit within the two unhit dozens, and bet all numbers of that same color,(5+5u) all except that particular last number hit. Spin until any of the two bet dozens hit, then STOP, (and restart procedure) IF zero hit also STOP, (and wait for hit in any doz)
For an example, let's say doz 1 hits, now you check last numbers hit in doz 2 and 3. Let's say last number hit in doz 2 was 16 RED, now you bet all RED numbers within doz 2, except number 16 (5u bet) Let's say last number hit in doz 3 was 29 BLACK now you bet all BLACK numbers within doz 3 except number 29.
(First tests played with 5u bets)