Hi there I recently took my new bass to my local luthier to figure out which strings to replace its stock ones with I mentioned that I had read I should adjust the truss rod a little when switching strings. He took a look at the neck and said you need to do it anyway. And it's true since the bass had no set up since I bought it new. So I asked him if he could do the truss rod adjustment for me (thinking it was a minor tweak) he turned it like 1 and a half full turns in one pop. And I heard a pop sound!! I mean this guy is one of my cities best Luthiers and repairs and sets up expensive / vintage guitars for a lot of famous musicians. But every where I read you should only make a quarter turn a day. I asked him about it and he said to me ... "thats ********"! So is it safe to make such radical turns? or should it only be done by experts, I was pretty freaked out by the sound it made If anyone can put me out of my paranoia I would be grateful.