I originally had that exact same oar and oar lock set up on my Hyde drift boat, but soon changed to the V-lams with the shoal cut blade because I found I preferred the narrower, and seemingly lighter, shaft and blade of the V-lamps, and didn't need the heavier duty Dynalite blades for the rivers I float (and I don't often wedge my oar blades between rocks, or use them to push off gravel bars, etc.!).
However, I recently sold my Hyde and am ordering a new Clackacraft for this coming spring, and will be getting the Sawyer Mountain Driftboat oars (a custom variation of the Squaretops with Dynalite blade, designed a by Gary Beebe in Victor, ID). These oars are sold directly by Clackacraft for their driftboats, and by Beebe also.
However, I am not going to go with the Cobra oarlocks on my Clackacraft, after using them for the past 4 years, and after talking to Beebe at lengthy about them - he knows a lot more than I do about them, and I think what he said makes sense. Among other things, he said that these oar locks are designed for your oars to be able to pop out if needed in a dangerous whitewater situation, such as in whitewater rafting situations - I'm probably paraphrasing what he said, and I don't need or want that on my drift boat - perhaps your usage might be different. Plus, even after carefully tuning the Cobras to my oars. I didn't find them to be particularly easy for rowing. For that reason, I'm going back to getting good ole standard brass NRS oarlocks for my new boat.
John