Connie or anyone who has a "Nymph", would you please give me some oarlock socket measurements? I presently have one set of sockets setup for single handling and would now like to add a set for a passenger sitting astern. If I had a second passenger sitting in the bow I guess I would use the single handling sockets? Also, I have Perko North River oarlocks that have a pin rivet holding them to the oar. I like these oarlocks. They keep the oars attached to the boat and they are easy to use especially for novice rowers. But I've never been happy, in the past, with the way that I've attached the pin. Would someone give me advice on how to round over this pin rivet. Thanks, Rick Langer M15 "Sialia" #337 p.s. I finally decided on a name for my boat after watching a bluebird couple use the boats horizontal mast as their favorite hunting perch while feeding their brood and she does have a blue hull.