counterweights for Sawyer oars
I'm trying to buy a (belated) xmas gift for a friend who has absurdly heavy Sawyer oars (fiberglass? shafts, wood blades, several years old) for his driftboat. This is probably a function of the length of the oar vs. boat width, but he's a crusty character (and dear friend) and is not about to buy new oars. His wife is learning to row as well, and she's struggling with these (I've rowed the boat and immediately thought "why the hell doesn't he have counterweights?). I'm wondering if the Cataract counterweights that wrap around the shaft would fit Sawyer oars- they seem considerably thicker than cataracts (?). Any ideas? I know you can make counterweights but this is a gift, so that's out (we no longer live close together or I'd go over there and do it). Any help would be appreciated.
Ps- I know oars with counterweights can be unpleasant in heavy water, but that's not really the issue here- his driftboat is a flyfishing getaway, not a whitewater thrill ride...