Just a word of caution for those intending to use NYC or NYC spec tuners on the Metro 5's:
In short, there is a lot more going on with that mod than the color or shape of the tuners. The headstocks are actually laid out differently on the two different instruments. May seem obvious when you think about it; but Roger, being the perfectionist that he is, made sure that the string path from the nut to the side of the tuner barrel was perfectly straight for both instruments. Since there is substantial difference between the barrel diameters, simply performing a concentric enlargement of the Metro holes and installing the NYC (spec) gears does not result in the expected straight line string path.
I just did this mod on my Metro 5; and the result is good with me, even if the optics are slightly less than optimal, simply because I vastly prefer the larger gears. The smaller Metro gears certainly work; but the rest of the Metro construction is so top notch that the tuners for me were kind of like a hang nail. I understand the economics; but, that one is still a bit of a head scratcher.
Anyhow, couple lessons: first, there is a LOT more that goes into these instruments than the casual glance might suggest. Second, it is good to be aware of some of the not necessarily obvious construction details.
FWIW, YMMV