Built for 1.28g’s was an crash looking for a place to happen.
Design failure or lack of it ( as here ) is pretty obscure…as there are even free programs to define the spar web and cap thickness for each material.
Anyway if you buy all the material from Home Depo the disaster is about to take place.
This guy cannot be serious.
https://www.youtube.com/watch?v=1V8quR2P7lw