I've been letting this one sit and sit. It's at 3.5 months now. One of the gallons has a mild pellicle, the other doesn't. I'm not concerned.
I'm still hesitant to bother with gravity readings since I don't want to infect my only hydrometer. It is however, about time to rack onto some new foods for the bugs, and off that mass of sludge (per advice on Mad Fermentationist to rack as normal until off sediment / trub (no trub in mead, so I usually go close to 3-4 months before first racking)). Both of them are pretty clear to this point,
One of the Gallons will be aged on some bourbon soaked light oak chips. And the other is going to get strawberries. I'll be saving the cake for later use because I payed big bucks for that yeast bug mix, and I want to see how it changes the characteristics. As of now it tastes similar to how it did before with only a bit more sourness and a chunk more funk in the back.