First time poster and builder here. I am following a really great circuit digram from Rod Elliott but looking for some advice on how to properly ground things and reduce hum as much as possible.
Here's what I have wired up so far:
The horribly drawn squiggly thing on the bottom right is a resistor to an LED for power on indicator.
I'll list all my questions out at once, forgive me if some seem repetitive.
1. Should the metal case itself be grounded/connected to anything?
2. Should the phono input/outputs be isolated from the case? (the power socket is currently as it has a plastic enclosure).
3. The output pins on the P06 (J1) have “RLG”. Does the “G” go to the shields of both the L and R sockets? On the input side there’s J3 and J4 which each have their own “G”, so I didn’t have that confusion there.
4. Are all “G” markings the same ground?
5. Am I ok without using shielding on the audio cables if they are short?
6. If I do use shielding, how do I connect the shield (on both ends?) ?
Many thanks for all your help.
Here's what I have wired up so far:

The horribly drawn squiggly thing on the bottom right is a resistor to an LED for power on indicator.
I'll list all my questions out at once, forgive me if some seem repetitive.
1. Should the metal case itself be grounded/connected to anything?
2. Should the phono input/outputs be isolated from the case? (the power socket is currently as it has a plastic enclosure).
3. The output pins on the P06 (J1) have “RLG”. Does the “G” go to the shields of both the L and R sockets? On the input side there’s J3 and J4 which each have their own “G”, so I didn’t have that confusion there.
4. Are all “G” markings the same ground?
5. Am I ok without using shielding on the audio cables if they are short?
6. If I do use shielding, how do I connect the shield (on both ends?) ?
Many thanks for all your help.