I'm trying to finish up a banjo assembly but I continue to hit a wall when it comes to drawing the strings inside the assembly. I created a part in place and want to use the sketches from other parts for my keypoint curve and then sweep. I drew circle sketches in all the necessary parts to give the eventual curve its shape and reference points. When I'm editing the new string part, I can't select the sketches using keypoint curve. I've seen this done before but I can't remember the step for activating? or copying the sketches into the new part.

Any help would be greatly appreciated. I've spent days trying to figure this out.