Just thought I would update, since the original recipe I quoted used A LOT of back-sweetening. I used a little less than 1.5 lbs of honey to bring the SG up to 1.016 and that's where it has stayed for the last ten days. I might back-sweeten up to 1.020 later, if it seems it needs it. Before back-sweetening it seemed pretty acidic, but at 1.016 the acidity seems fine.
1 oz of heavy toasted oak cubes have added a slight charred taste, but not overly so. I've already removed them, since I really dislike too much oak.
Anyway, this is going to bulk age in a soda keg until Christmas and then I'll rack & check on it again. I think next time I would add more black currants, and maybe some blueberries for complexity.
I tasted it next to pre- and post- back-sweetened samples from my Northstar cherry Riesling pyment, and the black currants are kind of one-dimensional next to my homegrown pie cherries. Okay, the Riesling juice might have had something to do with that too.

But since these cherries also have an eye-popping acidity, it was interesting to compare the resulting wines. The black currants seem smooth & subtle, next to that bright cherry fruit. I'll definitely be making black currant melomel again... after this one is bottled.