Ding ding ding.
Checked everything for the 13th time. Noticed I installed the C18 "OMIT" 10nf capacitor. So, I took the board out and, why not, checked the gain pot, because HAHAHAHA I COULDN'T POSSIBLY HAVE EFFED UP THE GAIN POT!!!!!11!!
So, I effed up the gain pot. Master and Gain pots...