CJJB doesn't mention adding tannin. Maybe you might want to go easy on that.
OTOH, he also has more sugar with his red goosegog than with his green goosegog, which seems arse about face to me, but hey
Your sugars look about where he has his red. Maybe look up goosegogs on Moley's list and do a sanity check on the sugar, or get a gravity reading before the last few hundred gm go in