King Rooney...
That's a great idea. You can even do a great experiment that will help with your questions on a previous post
here At 0800 on a Thursday morning, using the real world ATC option, hand fly the ILS on the 737-400 into Heathrow.
Then go off on a bender of drink and drugs for the weekend and then hand fly the same ILS on the Monday morning......and see if there's a difference. (Make sure to save both Flight profiles so that you can see how you did!)
Keep alternating from bender to bender for six months or so and by then you should see a pattern start to emerge.