Got a NetMD 707 or 505 player? Really desperate for the additional features found in the MZ-N1? Well, thankfully, it will cost you nothing. I recently found a site detailing how to hack the EEPROM to re-enable the nicer features. So if you want to hack your MD then follow that link.
I can confirm that it does work on the 707 (v1.3), and assume it works on other versions as well. It’s worth it for the adjustable speed alone.