I think similar to Sports on the matter of adding form analysis to a system but instead of backing a horse in a race that looks obviously more qualified to win than the system's selection, I just leave the race alone as I like to keep my system bets separate from my form bets. I have been 'doing the form' for over 30yrs., so I don't have a confidence problem in this area.

I am amazed that many punters will spend huge amount of time working out systems yet won't put in a few yards to learn and practise one of the basics of punting ...form study.
There is reams of info. available on coming to grips with race analysis and many different approaches to the subject from the more complex 'formline' style commonly heard on the radio, to the simpler approach of giving each horse in a race points [or to start with, even the first 5 in the pre-post betting line] for meeting certain criteria. Both methods are valid and the more complex is in no way superior or more successful to methods that are far easier, but just as valid.