Sperzel's are fine, but they are old technology, and there are much better gears on the market. If you want locking, go with the Gotoh 510 locking gears. The machining is better than anything Sperzel or Schaller have ever done, the quality of the plating is better (more consistant), and their locking mechanism is much easier to use. If you don't need locking tuners, and on a 335 you really don't, then I would suggest the regular Gotoh 510s. They are a little more expensive than Schallers, but their quality is much nicer.
Myself, I would never put anything but 510s on any guitar I build, which says something.
Light
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