There is a pair of 9' wooden motors that came with a driftboat we just aquired. They are NOT new and we believe we want to get a spare. Is there a reason to use 10' oars as opposed to these shorter ones? Anybody have opinions on oar length? Questioning getting a pair of 10's and useing a 9' for the spare or just sticking with the 9's and getting only one.

....lee s.