The biggest issue with the whole using rudder for different reasons is HOW you use it, and that generally only comes with time and hours( not airline hours) in the air exploring the way your aircraft behaves, using rudder to "pick up" a stalled wing is the right way, trying to use a control surface on a wing that's not flying will give an interesting ride, but, as Motz writes over use of the rudder can get it real exciting , using direct,measured inputs comes with experiance ( that's why we have instructors beside us) to have some one slam in full rudder in a stalled condition will get the heart pumping ,unless you want to spin. The same with aileron, I've sat beside a 400 hr pilot while we lurched all over the sky on final ( it was gusty ,but not that gusty) thinking "if he lets the IAS get below 55 again I'm taking over" ,he was behind the plane and using the ailerons like he was trying to flap like a bird. Another mate has a lot to do with RV's ,he says he can tell if someone will fly it well by the way they hold the stick, " the grip of death" means a wild ride,,,,,two fingers " it be easier" , over controlling is the biggest thing a lot of us have to learn not to do.
Back to rudder on final, I use the rudder all the time,constantly, on final, on base, on downwind, enroute, getting to the hanger ,,,,I use it when I'm turning, climbing ,descending ,,,,,,,and it's always in company with another ( or all) control surface,,,,and hopefully in just the right amount, for all controls. Learning finesse for me was the most difficult, learning that some time the rudder might need a quick jab almost to the stops( landing here) but that the same quick jab isn't going to fix every situation, doing aerobatic endorsement , I had to learn that the stops are there so you know when to stop pushing the stick ( in some manoeuvres ) , I'm a big advocate of experimenting with the low end of flight, I've asked heaps of pilots if they've tried flying around below the posted stall speed, very rarely does anyone say "yep" , but when I mention flying a common trainer at 22 kias holding height ( with very careful use of all the controls) and I encourage them to take an instructor up and try it, not many have though.
I don't really know the standards or regs regarding pitot/static errors,,,,,but I do know what my plane feels like when it doesn't want to fly so well anymore, I've learnt how to land it in really sh1t winds, I've learnt ( still learning ) to land it in the shortest possible distance, which I might add is one skill that will definatly save your life one day,
The thing is to know the plane your in, and that can only come from experimenting on the edges,
Matty
P.s I know the ASI won't be indicating properly in a high alpha situation re all the errors in previous posts, but it's the easiest way to get an idea.