The roulette is make of 36 number, when u bet 20 of them , u are at advantage edge, more than 50% of win.
I have tried in machine , this work like this.
Every bet put Usd 20, no matter win or lost.
some number put 2, some, 1.5 some 1, these are all capital increase bet.
and the rest, put the 3 number street bet, get back half of the money, get usd11 from usd20.
so u cover up almost 90 % of number, 70% is win big %, 20 % lost 9 usd,10 % lost,
I saw the money keep build up, no need to gusss number, simply put anything, this way,
Win more lost less,
20 section of this, make about 30% profit.
need only usd 400 , or 20usd note each time insert bill in.
Try and let me know
good luck with this.