I recently ordered a very nicely built carbon-fiber righting bar from Jeremy at Surf City Catamarans in Santa Cruz. He sold it to me with the warning that installation on a 17 would require fabrication. (Why? the 17 tramp slopes upward starting about 20" aft of the front cross-bar. So if you attach the righting bar to the cross bar, when it lays back against the tramp, it will point downward, which means the last foot or so of the righting bar will constantly drag in the water. Or you can tightly secure it to the rear cross bar, which will create a stiff hump in the tramp, and perhaps damage the righting bar or the tramp)
The solution is to attach it to the bottom of the dolphin striker so it will point straight back to the rear cross bar. So here is how I did it.
The following is fully DIY with a hand drill, bench vise, hack saw, three drill bits, and a 1/4-20 tap.
I found a piece of aluminum that was thick enough and wide enough to make the two aluminum brackets in the pic. (email me for exact dimensions; boat's 30 miles away right now) I measured the diameter of the dolphin striker lateral support rod; drilled that diameter hole in the aluminum; cut the whole thing in half; drilled tap holes (#7 drill) in the aluminum; clamped everything together on the boat; used the tap holes as a guide to drill the holes in the stainless bracket on the righting bar; tapped the 1/4-20 holes in aluminum.
Tested on the water, worked perfectly; I weigh about 180, and the boat righted very quickly. A righting bar is a safety must-have
on a 17.
Here are the pics: