I was doing grounds first when I initially got my CD, it would take an eternity to draw down and the brew was a bit muddy as a consequence. Fortunately The Hoff shared his* method a few short weeks later and that solved everything.
* Tho' I seem to recall he got the tip from somewhere else.
I use The Hoff's Clever Dripper method with my decaf, works a treat.
https://youtu.be/RpOdennxP24?feature=shared