Hey folks, now this isn’t my idea, so I’m going to give credit where credit is due.  (See: http://www.diyphotography.net/the-strobist-corner-extending-your-ttl-flash-cord for the original blog post).  However I wanted to write and say that this works perfectly.  I purchased a E-TTL extension cable.  I didn’t buy a Canon one because I wasn’t going to risk ruining such an expensive OEM cable.  However, the other day I found a cheap alternative online.  Tonight I cut it in half as the blog post described and I connected the ends to 2 Cat5E keystone connectors.  The result?  Well, it works perfectly.  I tried it with a 50 foot cat5 cable and it’s flawless.  I can’t wait to give this a try soon.  Syl Arena is giving his Speedliter’s Intensive Workshop for us tomorrow, so I’ll be sure to take it with me!  I hope it works in the field.  :-)