I remember reading- away back - a similar idea .

Wait until a number repeats 3 times then start betting each and every qualifying number.

I never tested it so don't know it's value.

I didn't said three times, the selection includes only numbers which have appeared twice, then I bet those numbers till only 1 of them has three hits within 37 spins (including charting for numbers selection)

Reyth,

yes you can tailor the duration according to your liking.

For example instead of 3 numbers with 2 hits only, you could wait till there are 6 or 9 numbers with two hits only.

By doing so you should reduce the event's horizon proportionally.

If for 3 numbers the horizon is 37 spins, for the double amount of numbers you bet half the duration (18 spins)

There is something very important which is easy to miss, the main principle is at least 1 number to hit 3 times within 37 spins.

Therefore if you wait for 6,7,8,9...etc one of the already repeated numbers could hit for third time,thus you shouldn't expect second 3 timer within the same cycle, you should expand the event horizon to 2 cycles in order to average out expectation.

The expectation should be always the minimum possible regardless of the event we choose.