is it possible to mirror a composite curve about a plane?

I'm working on a helicopter fuselage, I have the loft profiles set up and some guide curves, but I was still not happy with the results.

I created a compound curve along points where there are changes in tangencies and hope this will "smooth" things out. The curve though is on just one side of the fuselage though and I need it on both sides. I could create another curve like I did the first, but then there would be no guarantee that they are identical.

any suggestions?

thanks