Here's an Opus Update:
I finished the main body and head, did a CFA, and Opus is now whole! I resized and tweaked his feet, shaped his face and added a mouth (which still needs a lot of work). Added the bow tie and collar, too, and gave him some hands.
Thanks to Chris Thom's inspiration, he now has constrained-to-surface pupils.
The modeling's nearly done; time to tackle the rigging. I hope to be animating by next weekend.
Here's a pic: