Yeah using all key lime juice made it horribly sour. A glass would give me bad heartburn. It has definitely mellowed out but I've been aging it since I started this thread ;-) I've probably said this a few times already, but I will bottle it one day. Or, just drink it right out of the carboy until I can fit it in some jugs and refrigerate it. I would like that carboy freed up. Me and a few other people drank some of it a few months ago and 2 out of 4 liked it, myself included. The other 2 thought it was still too sour. It is certainly more sour than a regular skeeter pee but much more drinkable than it was before. I considered tasting some more this past weekend but ultimately was won over by the Bell's beer and Founder's in my fridge. Maybe tonight I'll pour out a few glasses worth and see how she's doing.
Edit: I just noticed I've been aging this for 2 years! I better taste this after work!