And, yes, they can take a beating.
I'm over 230lbs and make over 2000W and pull on these rigs like I'm trying to rip my arms off. They don't budge.
Here is one pic from a unit that I made when I lived in Portland (you can see it in the background).
This pic is from a workout that I did in Kirk Whiteman's studio on a CycleOps indoor cycle (not modded).
They can handle abuse.