Have any of you considered IronCAD?
http://www.ironcad.com
Check out the site. I think you'll be very impressed by the information provided. I attended a demo and was knocked off my seat by how impressive it was.

Regards,

Terry W. Prather
Metrologist


BOSCH
AIRFLOW SYSTEMS GROUP
1613 Progress Dr.
Albion, IN 46701
Phone: (219)636-4299
Fax: (219)636-1106
E-Mail: mailto:terry.prather@us.bosch.com