ALPAKA HUB CARDHOLDER MOD FOR PD SLING 6L

You need a flat plastic stick, gently pry and the fidlock clip will pop out of the clamp.
And you will need a 20mm wide fabric strap to sew the loop that connects to the printed clip.
You can print with any filament you like but I recommend printing with petg, it is durable and has good UV resistance.

I print with fuzzy skin mode, the parameters are as below to get the surface on the image.