The casual quilter was kind enough to send me some very helpful info on doing Pantos. First chance I get I will share the love and pass it on, just PM me with your info.
She's right, just relax, hold your elbows in to your side and move your entire body. Use the panto as a guide but don't focus so hard on staying right on the line and you will end up with a more natural effect.
Happy Quilting!