Hi Marc,
This is a great idea! The only thing is that your target weight is a little pessimistic. I'd say you can make it around 11lb max with all scale detailing.
Anyway, good luck! And let us know if George and I can be any help.
BTW: our laser cutter is complete and working. I'm almost finished on the new wing for our LaGG-3. I wish I would have more time to dedicate to this.

Best regards,
Mike