Just gotta share with you guys. I'm so happy. Here's the story:
A couple of years ago, I accidentally dropped my Sony HVL-56AM flash, and the plastic rails on the bottom broke off, rendering my $459 (or something in that vicinity) fancy flash unusable, either on or off camera. I didn't know where to turn to get it fixed (why would I ever think to call SONY...that would require brain power after all).
Long story short, after hunting high and low online, with no success, for a fix for it; a couple of weeks ago I found a message board that listed the part for the flash "foot," (who knew it was called a foot??), and I checked the Sony site and it was available. Cost me another $66, and then the wait began to see if I could actually install it myself. Looked easy enough. Just four little screws. It was the circuit board I was concerned about.
Well, the new foot arrived today. Took me all of five minutes to get it installed and working. The circuit board just plugs in, just like stuff in your computer, but a lot smaller. Would have taken me about two minutes, but my fingers are just too fat. 
And just to make this post "legal," here's a photo of the broken foot, taken with the T2i, 18-55mm IS kit lens, and my YN-48 flash.
HOSTED PHOTO
please log in to view hosted photos in full size.
I think you can see that the rail on the right is completely broken off. The one on the left had the entire top sheared off, but was left with the bottom 1/2.
I'm pretty proud of me for managing to do this. And now I have two complete camera systems and two flash units. Oh yeah.... the Sony works wirelessly because I have a trigger for it. Too bad it's not compatible with the T2i.
Now if only I knew how to work either flash, I'd really be a happy girl.:o