#1
how do you lock down a fender mustang tremelo? my mustang never stays intune and i dont use tremelo
#2
Jam a bit of wood in it. Take some time to set it up if it goes out of tune frequently; it shouldn't be doing that.
There's a good chance that what I've written above is useless and if you take any of the advice it's your own fault.
#3
what do you mean jam a bit of wood down it? i have heard of people using washers but im not really sure how they do it