Watch out for the phytic acid in the oats and sunflower seeds. Phytic acid chelates with zinc, magnesium, calcium and iron, making them much less bioavailable. So, looking at the spreadsheet, it looks like you'll need an alternative source of calcium and magnesium; also, eat meat at a different time from the shake to absorb the zinc and iron.

Maybe just have a daily glass of water with Concentrace or something similar to make sure you have enough of those minerals. CFAR supplies Concentrace at its office; they seem persuaded of its worth.

Redacted: Also, be deliberate about the omega-3 to omega-6 fat ratio of your diet. The proportion of omega-6 fats is too high in modern diets, which some research suggests causes problems from depression to inflammation. If you use grass-fed milk, you'll be fine. Grain-fed animals have more omega-6 fats relative to omega-3 fats than grass-fed animals.

As AlexSchell points out below, milk contains very little omega-3 or omega-6 fats. Here is a good listing of the fat contents of common foods.