Tips for disassembling the top band support on Surface Headphones?

So like many others, my headphones have snapped at the band after 13 months of near daily use (sadly, only a little after the warranty expired) and after browsing some solutions I think I'd like to 3D print a replica part and use that in place of the broken one.

There are a few guides out there for disassembling and fixing the Microsoft Surface Headphones 1st gen bands which I've noticed have black sliders that can be taken out, but I'm having trouble figuring out how to disassemble the Surface Headphones 2, which I think uses the same mechanism with a clear plastic.

One of the guides I'm looking at here appears to take out those black sliders using a credit card or screwdriver but I'm having trouble doing this without snapping the plastic itself, and was wondering if maybe that is the only way to go.

Here's an image of what my headphones look like at the moment:

If anyone has any tips for this, would greatly appreciate it!