Gator aid. Or how to get the most from your Gator.

[allsorts]

Hello there. I have been reading a lot of threads lately (possibly too many) as I'm laid up with a broken leg. Haven't come across any reference (other a pic somewhere) to using a hdam, eg a GD - Audio "Moon" that i used with a Zero 09 dac in lieu of the dual Burr Brown 2604 opamp. I use my caiman strictly as a dac from a macmini to a marantz pm7003.
I wonder whether i could 1) swap it? 2) if yes, do i need to ground it? as it comes with a ground wire with a metal ring at the end; 3) if yes, where would i ground it? I have the extension lead for it so i need to think about best positioning also if i proceed.
Any thoughts on whether it would be worth it? I am just an amateur when it comes to this stuff but the hdam certainly improved the sound of the Zero. I can't remember what opamp it replaced though. LM something i think.