The principle of this system is simple, take advantage of first-hitters and repeaters.
Start by betting 11 streets, exclude the one which has hit on last spin.
Another number comes and now you remove the street which the new number belongs, but you also place 1 chip of the same value straight up on the hitted number.
You continue on this fashion by removing the chips from the hitted streets one by one and betting simultaneously the hitted numbers where the streets' bets have been removed.
The total amount of streets that you bet will look like this: 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1.
The total of the numbers you are betting will look like this: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
As you see the total amount of your bets never exceeds the 11 units, therefore by winning a street you get +1 unit net and by winning a number +25 units net.
You continue till you win a straight up bet and then restart by betting 11 streets.
If you would not win a straight up bet but you win 5 different streets in a row you would stop and restart betting with 11 streets, in this case your net is +5 units.
We are going to cap the the total loss in 22 units (2 x 11) or less if you have already won street bets before you lose 2 times.
In such case you would change the bets to 2 splits, those which make you lost.
A split has a total payout of 18 times your bet, by betting 2 splits you could win 16 units net, thus you will bet those 2 splits for up to 9 spins in a row, after the 9 spins convert these 2 splits in 4 straight up numbers and bet them for up to 9 spins in a row.
During the recovery phase, whenever you win in total 22 or more units you stop right there and restart from the beginning, 11 streets betting.
If happens to not fully recover during the 18 spins of the recovery phase you should quit the session with a total loss of 76 units maximum.
Could you recommend any possible twist in order to improve it?