Long form nature recording 96+ hours.

Questions:
1. Is the wiring diagram/picture above the right to solder up an XLR plug for the EM258?
2. 24V phantom power: What Capacitor and Resistor would I use?
3. 48V Phantom Power: What Capacitor and Resistor would I use?
4. 4.7uF 25v aluminum electrolytic capacitor – can a 50v be used instead?
Bill of materials
4.7uF 25v aluminum electrolytic capacitor
100k potentiometer – for dialing in the right resistor? See here
