Im gonna have to pass on the rip saw cat, chances are its either a P. Niger or Oxydoras niger. Ive had them in the past plus the P. Niger TSN hybrid (that jumped outve my tank). An at 12" or larger if theres obsticles an tight areas in a tank, they just create a big mess.
Any chance you have any of those big clown loaches still? Or is there any chance youd consider letting go of a Endi or Delhezi (Smaller one)?