I'm going to shorten some Cataract Oars. Has anyone here actually done this before?

I'm thinking about using a Sawzall with a new small-toothed blade for the cutting the oar and either a drill bit or hole saw to cut the new hole out for the blade to snap into. Eye protection: check.

Sound about right? Should I wrap tape around the spot I'm going to cut the oar at? Or would that even matter?

Thanks.