Dear DevnMark
You are right that particular mechanic is a bullshit. I am using my EK 2006 since FEB 2011 and it is still as smooth as silk on idle no sound. Actually these cars are just like English Ma'aM, if you even pinch them on wrong place they could make your life hell ... 
I have a personal experience with a slight adjustment of buffle called DHOLKI. Pushed it slightly up as it rubs to the so called speed breakers in my area results it became a sports car with incredibly loud sound. just removing the knotted wire and let the DHOLKI free again suddenly resolved the issue.
In my opinion by doing all as you have mentioned above you did the BALATKAAR with your car .... LOL
Never mind done is done but you must have to do a lot more now. If you are in LAHORE then visit to Magic Motors Model Town, address is here:
https://www.facebook.com/MagicMotors/
I wish they could help you!
Best regards