There are many frame designs out there and almost as many frame designers these days. While it's relatively easy to use software to draw something up, there's much more to frame design than appears at first glance. We carry a few carefully selected frames to meet target size, performance and price points. We don't like frames that break. We do like frames that are rigid and well laid out. There are some 'not so secret' methods to making that a reality.
Things break from force and in our case, force is a function of mass and velocity. We know we're not going to slow you down so making it light is the first key to crash survival
Strong materials always help, but of course the force must be transferred somewhere so use strong materials where appropriate
Geometry, angles, curve radius, distance between holes and edges are the engineering side of structural strength and rigidity. These are the easiest design flaws to identify and the leading cause of broken arms and plates.