The elite-style watch strap alternative I finally created:

High-end watch straps

I strive to replicate the appearance and texture of the elite watch strap as closely as possible. Using plastic material alone is already convenient enough, but I've also thoughtfully added an optional cushioning pad! Simply print with a flexible material and attach it to the inside of component 1.

A total of eight screws are needed to fix this watch strap. I used 3×8 self-tapping screws, but metric screws would also work - but the screw threads need to be tapped before installation.

The design of the universal battery holder is exactly the same as my original design.