Steve:
Yes, OC-703 is the core for standard panel, and OC- 705 is available as an option.
705 is a bit easier on us [has better handling properties - its stiffer] - a few bucks more per panel for you to purchase - and will yield a finished panel that weighs about twice as much. We don't push 705, but you can get anything from the product line made with it if that's what you desire.
Other materials are also suitable and could possibly be utilized by special arrangement.
I look forward to working with you on your design.
Cheers,
PS: Pics of the door wire trick or we shoot the dog!
http://images.amazon.com/images/P/B0...1.LZZZZZZZ.jpg