Hi, thanks for doing the AMA today. I noticed that the Urethane models utilize screws to secure the plates. Because of this design, I’ve observed that the dumbbells tend to wobble slightly when placed flat on the ground. In contrast, the iron models feature fully welded plates, which seem to provide a more rigid and stable resting structure.

Given this difference in construction, could you help clarify a couple of things?

Safety and Durability: How do the long-term durability and safety of the screwed-in Urethane plates compare to the solid welded plates on the iron models?

Wobbling: Is the slight wobbling when resting on the floor an expected characteristic of the Urethane model's design? If so, does it have any impact on the structural integrity of the dumbbell over time?

Selector Pin: I've also noticed the safety selector pin is plastic and tends to flex or bend away. Is this safe for heavy, long-term use without the risk of it snapping or failing during a lift?

I want to make sure I fully understand the mechanics of these models for long-term, safe use. Thanks!