We all have our old favourites that look like they've been to hell and back and in our selective memories have never let us down but I reckon there is a lot of truth in what rangey said.
There is no rifle or accessory that is going to make a terrible shooter good but when guys have the basic's mastered and the difference between improving and stagnating is minuscule that's when the small little changes can make a big difference.
It's almost like a placebo effect, cross bred with a bit of sports psychology, sprinkled with that tiny bit of self confidence that was lacking.
Of course naturally gifted individuals like yourself and WH308 will just keep on keeping on come what may and more power to the two of ye.