Those weights are looking great Ken!
Glad you like pull-spring, still my favourite way of doing things.
Sure, I will include some extra CF in future parts kits. The 3K used on the tips right now are very stiff, so it's definitely optional.
I'll put you down for a Dbox wing, I can't wait to throw one of those! I bet it'll be pretty darn stiff!
It's cold up here, no flying today but I'll fly tomorrow, have fun!