I thought I'd post some photos of my recent upgrade, a two-up sliding seat rig for a sailing dory. We ordered the seats from Adirondack Rowing (thanks Pete and Karen). I designed it so it is easy to set up. It fits over the daggerboard trunk and the two sections connect with a lap joint. The forward station attaches with two 1/4-20 bolts into nuts that I epoxied into the underside of the thwart. It took a bit of fiddling and a few long rows but I think we got the positions, travel and foot rests in the right spots. There's plenty of clearance for the forward rower to straddle the daggerboard trunk. I still have some finish work to do and the foot rests will have foot straps. The dory rows great with this set up. It's faster, a lot easier on my back, more fun and a better overall workout. I have my oars set up with Douglas oarlocks and sleeves (Duckworks) - makes it easy to feather the oars. My wife's oars are set up with NRS Oar Rights. She doesn't care about feathering, just daydreaming and bird watching.