The Grover tuners arrived a day early, courtesy of Amazon. The exact designation for them is 406c-6 in-line Mini Rotomatic, locking tuners. They are a drop-in replacement on the Mikro; they install with ease.
The improvement was instantaneous, with the guitar now able to hold tune at standard pitch. The 18:1 gear ratio is pure pleasure.
However, no good deed goes unpunished, so of course the low E string ( .052 inches) barely fit through the peg hole and required a minor amount of drilling and fiddling before it would thread thru the peg. Then the locking mechanism bit thru the 4th string entirely, and left it too short to use. I had to crack open a second set (I hate to do that!). Maybe it was just part of the ‘getting familiar’ part of our relationship; at any rate, the tuners are behaving very nicely…
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