Hi Greg - also you may be interested in this previous message where jonah has a demo of using Blend + array to make something that resembles a sine wave, but is actually more rounded than a true sine wave.

It sounds like in your case that more rounded result would be better:
http://moi3d.com/forum/index.php?webtag=MOI&msg=1519.39

Something like that where you draw just one cycle of your "plumped" sine wave and then repeat it could be a better way for you to build your result rather than focusing so much on deforming an existing sine wave.

- Michael

Many thanks for your time... :-) I'll look into that post as well. Lately, I've been dealing with CNC software upgrades and their impact on my production of stuff.. But I'm done and back at the rounder "sine" wave problem since it applies to 3/4 of the project..

I've started to investigate metal forming programs as well.. It's sort of a rubber sheet and magnet problem..

But thanks again...and happy holidays..