I'm 50 and 6'1" and haven't "outgrown" a Mikro. And there are a lot of regular short scale strings that fit it just fine.
You didn't read the rest of my post. I also said the MiKro is for a niche customer base, of which you are one, and I hope you enjoy it. I stand by my comments, having helped a friend of mine set up and upgrade the pickups on a MiKro because he also is in the niche customer base with small hands. Myself, having played bass for @ forty-seven years, and helping more bass players than I can remember with lessons, setups, modifications, general advice, and so forth, it is better that a young player go the direction of a "conventional" well set up instrument at first to see what the aptitude and interest is and see if the student will grow into the physicality of an instrument, standard scale, short scale, or otherwise. She may in time prefer: no instrument, a "Fender standard" instrument, an instrument with a 35-inch scale, a MiKro herself, or anything else. But any music educator will tell you that you start young people on "standard" instruments to see where they go from there. This isn't a new concept. I say again: ask any beginning band instrument teacher in any public or private school that has a program, including my friend whom I set up and upgraded the pickups on his MiKro, who does not play a full size bass for that reason. Did you ever see a "short scale" trumpet, trombone, clarinet, or saxophone? And yet, young students who can hardly cover the spread of the valves, keys, or reach the positions fully master these instruments, no different than standard fretting. Leo Fender knew this: the original MusicMaster 30-inch scale bass was marketed as a "student" bass.
And BTW, I also play in a ukulele group where I use a Kala U-Bass with its 21-inch scale; my hands no longer can deal with 34-inch "Fender standard" scale due to old injuries, curved pinky fingers, and arthritis setting in. My main gig bass has a 33-inch scale; I own several 32-inch basses; my travel bass is a 30-inch scale as set forth above; and even all those years ago when I played a double bass for a jazz band and still had a reach with my left hand I had a false nut installed to decrease the scale length, called mensure on a double bass, for comfort. Oh - I also still play tuba in community band as well, now in my forty-sixth year since as a scrawny 120-pound freshman shouldered a full-size sousaphone for marching band as a freshman in high school. Don't under-estimate the ability of young players to make the instrument of their interest work.
I do agree there may be some sets of short scale strings that fit a MiKro, but for a student, the ability to find a good set of strings that conventionally fits the bass so you can teach the student how to mount a new set of strings in a straightforward manner without any of the machinations that a person sometimes has to process to get a string to fit a particular non-standard scale bass is paramount to lessening frustration in the student and encouraging ongoing interest in the instrument, no different than the manufacturers who make fractional scale strings for the various conventional fractional student sizes of the classical string instruments.
