Hello everyone, Here's a roulette system that i've had success with:
Wagering on the twelve's, we'll call 1-12 'L', 13-24 'M', and 25-36 'H'. Start spinning with no bets until 5 no occurrences happen in one of the three ranges in a row. Then place a $1 wager on the range of no occurrence. If it loses, bet progressively higher in this manner:

bet Each of the progressive wagers generates
a positive cashflow result.
$1 It IS time consuming, but the only way to lose
$2 is if one of the three 'twelves' didn't appear for
$3 17 consecutive spins. I've been playing this with
$4 'Play' money now for about 2 weeks without that
$6 happening. Comments/questions welcome.
$9
$13
$20
$30
$45
$67