I need a bit more midbase from my cdp

Try moving your speakers, start a bit closer to the wall.

Apply Walker Audio SST to the metal conducting ends of each JPS Labs item, and you may more quickly reach an enhanced performance, without even having to replace anything.
If you can spare your wiring for a few short days, consider enhanced breaking in (well used wires still benefit) by George Saubon of cableburner.com.
Using the best Mapleshade Records power strip can also make a really unexpected improvement.
Periodically, play the Densen DeMagic CD.
These ideas can carry you even further beyond the benefits you already hear with your RAM modded CDP.
Or, if you simply want a little more mid-bass, Herman may have already given you the key.

Are you using bass traps in your room? You will be amazed at how much more bass and larger soundstage etc is produced when you properly treat your room acoustically.

R.

Good thought from Red, it may not be a lack of midbass but a smearing of all bass frequencies from the the room. Don't you just hate/love how complicated even the simplest things can become?