The tiny D-C pump outperforms the WP136. 

Great report Bob!  Sounds like the little plastic Davies Craig pump is the hands down winner over the WP136 Meziere.  I'm not too concerned about the motor temp, because it's obviously made to run that hot, and still give good service life.  The best part about the test is that you did it, and my WP136 is still new in the box.  Now I can send it back to Summit for a refund :-)