Wow! Great responses. I hadn't considered a few of these things. Also didn't realize their were a couple of "characters" out there with both kits on their bikes? Really?

That's pretty nuts!
One more question. I'm considering buying a complete, running, low mileage engine and taking it completely apart and reworking it as a winter project. I realize from this forum that there are some subtle differences internally and some updates, but are all of the blocks identical externally? I have a 2013 Roadster. So, would a 2005 block fit my frame and foot rails/ABS etc.?
Thanks