Ben,
I just got done posting this short video I made that describes one option for extending a OWI. Give it a look, if you like, and feel free to post to your blog. I know you have been wanting short videos describing methods, and I hope this fits the bill.
Here’s the link:
http://www.jameshosler.com/2013/08/extend-one-word-image-to-end-class.html
James Hosler