Well, properly speaking, the CTAHR method, or Bittenbender method, involves blending your makas three times, doing three washes. Using 100g of grind, 1 cup, to make 2.2L of grog. This is not bad at all, this is a serious maceration, that stuff is in the blender for a long time. And three washes is more than one or two.
Still, were I to do that method. I would still put the leftover makas in the freezer and later try to get some more out of it. You might need to use economies of scale, saving the makas from two or three CTAHR preps and then using that to knead some more grog. I am fairly convinced that there are some KLs that can only be "liberated" from the root through the process if rehydration, then water getting into tiny cracks and then expanding those cracks through the freezing and thawing process.
With my techniques I get 6L or more of grog from 100ml grind and each shell is the same strength. I go to a minimum of 6 washes on all my root.