Upgraded my big rig to 11' oars (which fit great)
Had a 9' spare (with addn 1' extension) and a set of three 10' C/B oars to "dispose" of.
Sold two locally and then got a call from a guy in CO interested in the remaining c/b but only if it was 9' . Discussed the ability to cut the shaft down.
So took me about 10 minutes work to mod the oar and i shipped him a pair of 9' oars (only one C/b)
Note: not shown in the pic i used a 12" disc sander to get the end of the shaft perfectly smooth. If not for the missing cataract label you would never know it was chopped
Hey, if you want me to take a dump in a box and mark it "guaranteed", I will. I got spare time.