Graph Tech Ratio Locking Machine Heads GO

This is the third time I've modified a guitar with Ratio tuners, from a Mexican Fender to a Gibson Custom shop. The process takes about 15 minutes, and is easy as long as it's a straight swap (most tuners are). Fitting plates are supplied, but you'll need to make a special order to get gold or chrome plates (or any Fender 2-pin style). Check the Graph Tech site for a part number and ask Thomann to order it.
The machine heads are well made, very smooth in operation, and the individual ratios makes each tuner highly accurate and predictable. Having tried them I won't fit anything else now: If it's worth upgrading you might as well get the best.

As a locking tuner set, these are just superb quality.
The locking aspect is great, but if you're looking at these you probably already looked into that enough to know what it is about.
The ratio part of this set is amazing too!
For reference, I've got a set of Daddario EXL110BTs on it and tuning is far, far more easy now. Since the ratios are geared to specific string sizes, the results technically vary per string diameter, but in practicality I don't think you notice it. These ratio tuners still give their benefit, regardless of string gauge used.
Tuning is smooth and easy, much less of a hassle. Especially after a restring.