Noob questions about using NTSC N64 in Europe

[OHMSS]

A friend (not me ^^) is getting an NTSC-J N64 soon, so to be really sure I have some easy question for the europeans here. Please confirm or disagree:

1.) An easy and risk-free way of powering the NTSC N64 is just using the standard EU/PAL N64 power supply, right?

2.) One might aswell use the NTSC N64 power supply in combination with a 230V-to-120V converter, right?

3.) The only thing one must never do is plugging (e.g. with a cheap socket converter) the NTSC N64 power supply directly into an EU 230V socket, which would burn the power supply, right?

4.) Are NTSC and NTSC-J N64s electrically fully compatible? (it's 120V vs 100V and some japanese regions have 50Hz instead of 60Hz)

Thanks

[sweetener]

1) yes any n64 can be powered by any n64 power supply

2) you could, but the pal power supply will work fine

3) correct

4) n64s are DC powered so any differences at the AC end are irrelevent, but yes a jap n64 uses the same input power configuration as a usa and pal one

[OHMSS]

Perfect, thank you very much

[SimThreat]

This reminds me of the time I blew 2 NTSC power supplys by plugging them into a 240V socket with a cheap convertor.

[OHMSS]

Good times