Nice Post Shaun.

I'll try to help you with some comments.
Please don't think that I am trying to belittle you.
It seems Michaelg did when I tried to help him , and now he ran away.
As did Lomaca , although I'm not sure , but we may have kissed and made up.If so , History says its only temporary.
And don't think that I am trying to promote myself as being GOD's Gift to Mankind.
I genuinely wish to help - Nothing else. (well , maybe a little bit ego)

Not sticking with something long term is not your biggest downfall.
The reason you drift away , is because it no longer satisfies your needs.
Even if the system is providing a Profit, it is quite easy to drift away , because I get the feeling, based on the amount of research and learning that you do Shaun, that the actual developing of the System is what actually floats your boat the most.
I'll bet you Tinker and Tweak your Systems forever.
I don't mean removing bugs, but trying to get a better bottom line.
And I figure that is when you become disenchanted with your system , when the end of the line has been reached.
When there is no further improvement you can provide.
I'm figuring that you are trying to come up with a System that works all the time.
You need to accept that some Races you just plain gonna get wrong , and no amount of tinkering is gonna find the Winner of those Races.

I do Greyhound Markets , and I also have trouble trying to decide on the correct way to Wager using them.
If Your Markets are worth their salt , then the Profits will come , as long as only the Overlays are bet.

No , I'm not able to make a Profit as yet , but I have been complemented by a number of Punters that being square and not actually losing after 2 or 3 years is quite an effort.