Dear Morne,

if you give me detailed dimensions, materials and perhaps a picture of the wing mount i'll be glad to go over the numbers. I don't know my way around the FC/Composite MiG because i've never seen it disassembled....there are several constructions out there where the rods only carry about 20% of the load, the rest is induced over a different type of wing mount similar to that of full scale aircraft (which, by the way, usually do not have rods running through the plane at all, but in which steel bolts are used). These different types of mounts cannot be directly compared to one another....

Your equation "2x14mm=28mm" does not work. The loads induced on a round spar/rod climp to a fourth power to the radius, or the distance from the "neutral phase" to the point furthest away. Adding all other components to the equation (e-module, geometrical components, max bending module...) a third power to the diameter remains. With a 14mm rod, the highest radius you will get is 7mm, no matter how you turn the dice.
Two 14mm rods will be able to support twice the load of a single one. A 28mm rod has twice the diameter, thus 2³ or 8 times the burst-strength of a single 14mm rod!

As ET said, hardly anyone goes over the numbers. Some have a goot "gut feeling" on dimensions....others do not (those companies are usually those found in the forums when wings fold, control surfaces flutter, landing gear is worn out prematurely). Some do the math, thoise are usually the companies that charge a lot.
In some cases it will hold up to the personal "normal flying", with others it may not....we will see sooner or later. I just wanted to show with the help of some numbers that the wing mount appears to a weak point of the airplane, and appropriate care should be taken.
These are the numbers from an engineering standpoint. 10G, 12-13 with an excellent fastener. Whatever you do with these numbers is up to the individual reading them...

Regards
Hank