Must be nice to be retired, Rich.
Long-tme Buzz sponsor Downriver Equipment had a Sawyer oar blade on the wall that had been nibbled on by a crocodile on one of Pasquale's African adventures. You could probably study it and determine the bite pressure needed to penetrate the blade if you REALLY wanted to.
DRE's former owner, Mike Prosser, was one of the oarsmen on the trip and had a bunch of great photos under the glass at the counter. Not sure if the blade or photos are at the shop under the new owners but it would definitely be worth dropping in on the guys next time you're passing through Wheat Ridge.
zbaird at Raftfix.com, rowed on that trip too. There's even an IMAX movie/documentary about it - you can get to by following the link below.
Seems it was about six or eight weeks on the Blue Nile in Ethiopia
Check it out.