So in my second all grain BIAB batch I put together a chocolate milk stout, but due to a typo in my directions, I mashed a little too high and didn't get as many fermentables as I would have wished. It went from a 1.061 OG down to about a 1.023. I expected it to attenuate a little lower for a tiny bit more ABV. It's now in its second week in secondary, sitting on top of some cacao nibs and a vanilla bean. If I added just basic sugar (or even some DME?) at this point, would I get some more ABV out of it without thinning it out or ruining the product? Should I just be happy with the stout as it is? Its not like it falls out of style limits or anything, I just wanted a slight bit more ABV to this one. Thanks!