Small Zip repair

Remix of www.thingiverse.com/thing:6922465 but for 4mm x 2mm zips. Alternatively you can scale that thing down to around 70% to get it sort of fitting.
Its a great design so I imitated it to fit a broken zip on a duvet cover, It actually works better than the old metal (toffee) one did, so kudos xoid.
I made it to be an interference fit, so should press together and stay. The holes are 0.1mm bigger than the post that fits them.
Make sure any first layer squish isn't encroaching on interference holes.