Dreamer
Yes, when done correctly those props will perform well.
When manufactured with shoddy craftsmanship or materials they can fail.
However, we can say pretty much anything will fail if made shoddy enough or with materials not up to the task.
.... even a hammock, which is by no means a complex object, will fail if sewn with poor material or the wrong knots on the leads.
... and are not recommended for reproduction according to the AMA Safety Code
Where did MA magazine come up with that?
If the SC says that,
why is it so hard to find someone that can point to that part of the SC.