OME, don't be afraid of playing with firmware. As far as I know, you can't "brick" anything. I experiment with Arduino a lot and have uploaded many, many sketches (programs) to them. It's not like a camera firmware where they scare you saying that if something goes wrong you may have to send it to Canon or Nikon. If it fails, just fix the offending line of code and sent it back in. It's really easy.

So, given that, I ordered the parts today. I'm jumping in with you. Zennmaster's video is good, clear and useful. I'll have parts by later next week so if you are having trouble, I might be able to help you as I configure mine. This looks like a great upgrade and I'm excited about it. Not sure why I waited so long to do it as it's less then $20.