Ultimately, once the tuner is screwed down to the back of the headstock, it's pretty much there to stay...barring some serious blunt force trauma.
(Love that word, "blunt force trauma"!
)
When I first I hit upon the idea, it was mainly to make sure the tuning post is centered within the peg hole before screwing down the plate. If it happens to also give a little cushion to the ferrules, even better.
The artist's tape is cheap, easy to apply, trim and remove. I suppose one could get away with using any sort of adhesive strip material. Aluminum foil tape or something like that could be a viable alternative, but I suspect it's not so easy to remove.
While I've been typing up this post, I just remembered a brainstorm I had some time ago for a very
"crafty" (pun wholly intended
) way one could create their own spacer.
A friend of mine makes paper beads all the time, so I got to thinking I might be able to fabricate a spacer using a similar technique. All I'd need is a dowel the same diameter as the ferrules, long strips of paper and a bit of Mod Podge to hold it together and seal it up. Once I figure out exactly how wide and long the paper strips need to be, fabricating them should be relatively easy.
Let's say the paper strips need to be approximately 13" long.
(Not a proven length, just a random number I'm using as an example here.) Just to be sure I get proper fitment, I could make one that's 12", another at 13", yet another at 14" and so on. Once the Mod Podge has fully cured
(about 15-20 minutes per coat), I could check which one fits best and go from there.
Have I mentioned I love low-cost, artsy-crafty DIY solutions?