Panel Lines

 From:  The Mad Hatter (THE_MAD_HATTER)
3216.1 
So I've run into a problem creating nice panel lines. I have been using a circular sweep command around a rail followed by a boolean dif as Michael mentioned in another thread. However, where my lines meet, especially on curved surfaces, I have issues getting nice clean intersection points.

I believe I read a thread somewhere that referred to this as crowning?





Any recommendations on how to fix this or a better way to carve out my panel lines?