Has anyone successfully changed their Schaller non locking tuners out for drop in fit locking ones? My head is spinning with variations within the Schaller brand and I haven't been able to identify the correct tuning head. Spindle length seems to be an issue because of head stock width.
Help please.

You planning on installing a dive-bombing vibrato first? Otherwise you're probably wasting your time and money, from my experience.

Not an issue of maintaining tune. The floating stop tail makes it a pain to restring. Locking tuners would simplify the process.
By the way it's a 620 Ric.

I disagree it's a waist of time. I put Sperzel locking tuners on all my gits, except my Ric haven't done that yet, string change is faster and they stay in tune for weeks.

I even have them on my acoustic.

I would recommend them 100%.

Need a recommendation for fitment!

FITMENT?

noun
1.
equipment; furnishing.
2.
fitments, fittings: the fitments of a ship.
Origin:
1600–10; fit1 + -ment

What's the question?

I don't know the measurement for Schaller locking tuners, but if you just need help changing strings, a capo works wonders to hold the string tension on the tailpiece while you're threading and winding the string on the post, and costs a lot less than a new set of locking tuners.

Thanks BlueRick. Neat idea. I would still like the ease of string changing that I enjoy on my PRS guitars.
AintGotNoPokemon, sorry if my language disturbs you. I don't believe for a second that you misunderstood the question. The word "fitment", whether incorrectly or not, is commonly used when referring to the accurate parts fit in automobile mechanics.

The Schaller web site seems to be very complete with information. If you can correctly identify your tuner, then it would seem feasible to compare the specs of your tuner with the specs of the locking ones until you find one that matches.

http://guitar-machine-heads.com/hp12610/Guitars.htm?ITServ=C3ea72965X132e9eeb4f1X4cac

By selecting the "Detailed View" of any tuner, you go to a page that has all sorts of tabs and specific information, especially the "Technical Drawing" tab.

http://guitar-machine-heads.com/hp135052/Artikel-Liste.htm

There's a tab for "Downloads" that includes various images.

Or, if you still can't identify the appropriate locking substitute, email the Schaller company with the tuner you have (and mention specific guitar) and ask them for a recommendation.

My two cents.

Well, you should probably stop listening to Journey, and start believing. I had no ill-intentions, and still don't. I have never heard "fitment" used with guitars. And I certainly know little to nothing about cars.

But Maxwell has provided some good info.