Figuring out this Sweep command... Guitar body

Body.iptMy buddy is making his own guitar, and he isn't sure what he wants to do for a round over-type design around the edge, so he drew up the body and gave it to me to see if I can get something on there. Hopefully you can see it well enough, but I'm trying to sweep the triangle profile around the edge of the guitar, but I'm running into a problem. The triangle isn't staying perpendicular with the edge of the guitar... any ideas on how to accomplish this? Here is an example of a guitar that has it done. The chamfered around the edge is what I'm after.

The file is attached, along with some screen shots:

Hm, I'm not sure if the file got attached.... I don't see it anyway.

Well, here's a link to it from my Dropbox that you can download...

https://www.dropbox.com/s/0wjkta94avgyfau/Body.ipt

Did you try clicking on orientation 'path' rather than 'parallel'?

I did and got an error. Using parallel was the only way I could even get a sweep to work.

The cut sketch needs to be perpendicular to the sweep. The easiest way to do this is to create a sketch point on the sweep line, and create a work plane by point and line. Create your cut sketch on this line.

Don't forget to fully constrain your cut sketch!