And the result is previous spins have no correlation on future spins when the results are truly random.

This is absolutely correct. Past spins mean nothing - however a group of spins (cycle/session, etc) gives predictable results even though each spin is random and independent. Once you have something predictable you can use that. (coughs.... I'm not going to explain this dammit lol).

Here's a rough example using something everyone knows already - that law of thirds or whatever fancy name it has now (I think everything is packaged in 3 letter catch-phrases now ?).

Spin of cycles of 37 spins over and over and over until your balls hurt.

Tell me how many numbers appear once, twice, three times, not at all - etc.

I don't have to do this, I can tell you it's going to be damn near 24 numbers appearing

and 13 not appearing (on average... and yes it's a little off but I rounded stuff for the sake of the post). You can do this over and over. The total amount of numbers that appear will end up being 24...20...28...20...24...25...25...24...20....19....24 go on until you're tired - you'll end up with an incredible amount of cycles where it's 24.

Now think of the math of the game as it's commonly stated.

Any number has a 1 in 37 chance of appearing during a cycle of spins.

That means that any number on average will show up once per 37 spins.... we can all agree with this right ?

But no.. as you can test and prove to yourself - 24 numbers appear on average every 37 spins, not 37. There never will be 37 possible outcomes... just because there are 37 numbers and 37 spins in a cycle and each spin is independent - there will never be 37 numbers that show once and no repeats.

Now grab the eraser and make it every number has a 1 in 24 chance of appearing ?

You could do this or you could take this info and look into repeaters....

I said it until I'm blue in other posts. A number can't show twice unless it's shown once, it can't show 3 times unless it's shown twice, etc..

And most importantly - you can never lose a single unit on any number that doesn't appear because you never bet on it.

To answer the other questions OZON - work on it flat betting. The progression isn't one to pull out of drawdown - I'd call it a positive progression instead. Any progression just magnifies the results of whatever you're doing (Steve will agree I'm sure as well). If you're doing something wrong and using a progression you'll lose worse and worse.. if you're doing something that works - you'll win more and more (but the nay-sayers have to be open to accepting that there are things that do work - to them any progression just makes you lose more and faster). I've done my best to modify how I play down to a flat bet but I'd prefer to use a progression to win more faster instead of playing longer with smaller unit size.