Shielding never hurts. If the source impedance is low, like in a power supply, shielding does nothing but add complexity. However, having an entire unit shielded from RFI radio frequency interference, is always a good idea.
Just remember Lee PFM.LOL They are sending me 1 foot of it to test. Dude I have more wire coming also. You need to get me a list of what I need for the 4000. I will soon be sending the 3300.