I have to say I like those rubners (thanks for the info).
While I've never tried them I did upgrade a previous guitar buying the tuners straight from Cordoba. Their stuff is here:
https://www.cordobaguitars.com/shop/?filter_gear=parts
I bought the master series tuners for a C12. They are pricy ($135) but very good tuners. Don't have the Rubner roll though that's a nice feature.
TK