I have posted a method before there we bet all except one, and do so until a miss. We progress by risk, so we uncover a number every time we miss, and move the chip to a number we want to hit before it stand alone on the carpet.
This method allways show profit it we got a hit on the number. We use the same bet size all the time.
It happen we do not get a hit during all the spins until one number left, we have to find out a way to recover.
Today I tried it some other way, which means we must hit in 35 spins, but the winning is more.
I moved a chip to the number to hit every spin, regardless of it hit a number empty or with one chip.
The two first went very good. The third did not hit my number after 35 spins. I tried then to continue for some more spins, and added two chips to the uncovered numbers, leaving two empty.
I hit very fast, so I can not say this is tested at all.
We know a number can delay several 100 spins, and we can take a loss early or find a not too expensive way to extend the play a bit longer.