Using a single doublestreet - A Dozen is divided into two doublestreets.
When 2 hits in a row been made on one half of the dozen, bet the unhit part of that dozen with a single doublestreet.
Use progression for 1 Double Street. (waiting 6 spins before bet would decrease risk)
Bet......win
1.........05
1.........04
1.........03
2.........07
2.........05
3.........08
4.........10
5.........11
6.........11
7.........10
9.........13
11........14
14........18
18........24
22........26
27........29
31........22
37........21
45........24
55........29
67........34
82........42
97........35
115.......28
136.......18
164.......22
200.......38
240.......38
1402 units total
Will come with results later.
Another idea: Wait until two dozens have been hit, bet the unhit parts of those two dozen with doublestreets.
(Option. Wait 6 spins before bet)
2 Double Streets (each)
1 1 2 3 4 6 8 12 19 28 42 65 100 150 300
I prefer the 2nd option