That's the thing ain't it?
The customer's touch is different from the tech's touch... and what works with Hands Set A might not work with Hands Set B.
I've had my own guitar played by a tech in front of me - no buzz - then I play, there's buzz!
taypeng81, what I do to avoid such situations - because I dislike having to return to the tech to get things redone - is to just sit and play for say 10 mins at the shop. A-OK = usually A-OK then.
to be fair to KC, I did not ask him to redo it because i only really tried it out at home and found the rattling on the fretted note from the upper frets onwards unbearable. i didnt try it out extensively at the shop as i was running late to meet someone..my fault for not clarifying at the shop..