Why backfit?, why not just make your own history, select, "bet", result. If it wins, why "fix" it..If it loses, then make adjustmets.
Going back, is a bit like...gee I don't, but it don't make much sense.

I also note there is too much emphasis on selection and trying to get a 100 % strike rate. That's what it seems from here, testing 16 systems.
Been there to stebbo, at the end of the day, it comess down to one system for select, and another for bet/money management.

Either way, any of your 16 systems, may require a management, unless you have that figured out.