I see, thanks for the explanation.
I'm trying to design some toy train tracks as an example use of the master sketch, as I've learned so far.
I've made the profile, which I can extrude/pad to the shape I like, but now I'm a bit stuck on the end connectors. I'm attaching the design I've made so far, and the measurements are taken from this website:
Now, in the attached example, I've tried to make a track with id "E" as shown in the table on the above website, a basic bend/curve. The main part has worked fine, but now I'd like to try to connect the male and female end connectors to the main part. In the attached file I've sort of placed the connectors in approximately the place and padded them there. I didn't do the math, so it's visibly off it. I was hoping there was some way to snap the sketches on to the edge of the solid, so that they rotate and translate to the correct location. Then I could simply pad them there and keep everything parametric. Is this possible?