My understanding is that Rolex only intend the Oysterflex to sell with gold models. It is not offered with a single steel model. Not one. In which case, they will go out of their way to make fitting pretty tricky. It works both ways, apparently you can’t fix a metal Rolex bracelet to a model normally sold with Oysterflex. Knowing Rolex, none of this surprises me.
Anyway, what’s wrong with decent rubber straps? Cheaper….
The other issue is the adjustable Rolex clasp . Fitted to a standard Oysterflex it is excellent. In my case, I got a slightly oversized rubber blade, which fitted to the flexilink clasp gives wonderful flexibility, fit and forget. It’s great.