Soccer? Hope your daughter heals quickly. I guess I need to research the cplane command to fully understand what you are telling me to do.

Thanks for your post.

Update...

I understand Cplane now, but I don't think it will help. Since, as Michael mentioned, I only have the curve info at that awkward angle relative to the armrest curve. I guess if I'm not trying to reverse-engineer then it would be useful for defining my own curvature. Thanks for the tip.