I am not super advanced with my flanders red brewing, but I would recommend blending to taste, and then take the remainder, and add more wort, so you can keep the beer going. I am about 2 months into my second Flanders fermentation, and it seems to be working faster this time (already starting to show signs of a pellicle). In another month, I am going to taste test, and see where we are going. The first one took almost 18 months to keg. If I can get this down to 9mos, I will have a very happy wife.