I have a US NTSC SNES here I want to mod for universal playback. Not just Japanese, but PAL as well.

I've done the slot mod for the japanese import capability. I've also done a switched mod for the SNES lockout chip, so it can be enabled and disabled at will.

Is that it? Or is a 50/60Hz mod necessary as well?

I've no PAL games right now, plus I have a feeling that some games may need one mod, and not the other. Anyone know *for sure*?