I definitley agree on ERC beginning soon. When you get "stadium" effect and the eye tightens it seems the the "top" of the stadium becomes the edge of the outer eyewall that forms. It seems as the slant on the stadium effect becomes more pronounced the closer you come to ERC. Once again...I could be wrong...just an observation as not much is know about ERC triggers.
Also...definite WNW movement and it doesn't seem like a wobble. The motion seems rather clean and not jerky like a wobble.

http://www.ssd.noaa.gov/PS/TROP/DATA/RT/float-vis-loop.html

Click on the "lat/lon" box on top of the loop...makes it easy to see