Andd don't forget the little known forgotten technique of "Move/Size features. It's a toolbar button toggle (there is no menu item for it).
Go to Tools/Customize and select the "Commands Tab". In category, select Features. In the middle is a button with two double ended arrows and a green sphere at the center of each called Move/Size Features. Drag this button to your features toolbar.
Now toggle it on and when you select a feature, such as your swept wire, the sketch show up. Drag the spline points and the model will update.
To get more precise placement of the spline points, switch between the front/top/and side views. You could also split the screen for this purpose.
Jason Capriotti
Smith & Nephew, Inc.