My uncle gave me the cataraft. I have no idea where he got the oarlocks, but I really like them. Regarding the towers, they appear less burley, but because there are 4 bars for it each forming a triangle it seems to hold up really well. My uncle also built the frame, so I can't speak too much to the specs.
"Believe me, my young friend, there is nothing — absolutely nothing — half so much worth doing as simply messing about in boats." -Ratty, Wind In The Willows, Kenneth Grahame