Originally Posted by XeoFLCL
I'd consider going with at least a .72 for F#, as anything below that will be flub. Also F# is definitely doable on 25.5", but it won't sound as clear as say a 27" scale.
Also, you can always unwind the tip of the string to get it through the tuner, which is what alot of us do here.
or you could use a drill like me