How do you guys feel about cutting/modifying/enlarging your tuning peg holes to install locking tuners?
reason:
I am looking into the Sperzel trim loks but I have a limited edition 57 american reissue strat and this type of modification will devalue it. 
I install tuners for a living.
I would suggest the Gotoh locking vintage style if you desire keeping the vintage look AND aren't good at wood working.
On the other hand, I enjoy and use the Sperzel Trim-Lok tuners on several of my own Strats because I know going back to vintage-style tuners is as simple as replacing the original ferrules with
conversion bushing ferrules if I choose to go back later.
The warning I would give you is that many individuals and music stores that install Sperzel tuners don't have the right tools to get the correct fit and alignment of Sperzel tuners the FIRST time....and they end up with the tuners centered off a bit to the left or right because of problems correctly placing the "pin" under the Sperzel tuner. Looks a bit like a wobbly fence.

If you're going to install any of the modern tuners, find someone with
this jig to correctly place & install your tuners.


I know it doesn't appear to be rocket science, BUT I see hack-job tuner installs all the time that I have to fix....so take the time and get it done right.