RC Car Battery Charger Buttons (that don't fall out)

Er, my battery charger for my RC cars is super janky and the buttons fall out.

I made these so they'd stop.

V1 works and is intalled.

V3 is probably better but I haven't tested it.

To install, just shake out/tug out the old buttons, make sure the inner post is centered and push these in.

I'd print without a brim if you can.