before I answer your latest post I will respond to a previous post you made. The RCM Jig I believe spurred a myriad of clone designs but RCM held the copyright for their design and so it was always a little more expensive. As for the post I believe that with the number of readers that have QUALITY 3D printers I would hope that someone would redesign the appropriate parts of the design and update the materials to current day i.e. Carbon Fibre and then post the printer files for forum usage.
In relation to the designing of Model aircraft it is a HUGE topic with different considerations required for each new material used. Sure you can make anything fly with enough strength and power but the true designer will always turn out the plane with the best performance, and highest strength to weight ratio.
Whilst I will always assist where I can I do not plan to or even have time to "DOWNLOAD" a lifetime of information to those who are not really interested in how it flys but rather just in that it flys. Recently I received a "NIGGLE" from a fellow member who seemed to think that FB and Balsa were mutually exclusive and that Balsa was too heavy.
As a result I am preparing a post where I make 4 different versions of the same FB design with varying levels of Balsa reinforcement from an ALL FB version to an ALL BALSA version. Then I will compare flight performances and weights. I doubt I will deliberately crash any of them to verify their robustness, though I will give them a serious "HIGH G" flying experience for sure. Once made the planes will be, (not being of my own design), gifted to fellow fliers in my local club if they still have any more room in their hangars.
I will watch the development of this thread and its daughter thread will acute interest.