Reverse Engineering of any "free-form" part is not easy. I would suggest using Holos to collect the measurements and create some of the simple surfaces. After that you are better off using a true CAD surfacing package. Most people forget that this is "Reverse Engineering" and not "Reverse Inspection." Give me a call or e-mail if you would like more information. I do these kinds of projects all the time.
tomz@cmm-measure.com
(503) 223-9944 x108
Tom Zitzelberger
Cascade Engineering Tech., Inc.
http://www.cmm-measure.com