I think the answer is all systems have a lifespan, you need to constantly monitor this and decide when the time is right to make changes.

Mark is a numbers man so systems with always get a negative review by him, but he will also agree even what he does still requires monitoring and not all angles will continue in to the future.

Mark, remember way back with the first risk free system put up by yourself and Allanby?

It was the bookies that put an end to that one.

No matter what path you follow you must also be researching the next path.