MINI (1st Gen) Key lock button replacement

Unfortunately the rubber button on my MINI key decided to tear and then disintegrate...

For anyone else who encounters this problem, I present to you my replacement button!

Simply print both parts (Outer ring and button) then cut out any remaining fragments of the rubber button, leaving only a small engraved ring around a hole (As shown in 2nd picture)

Then slot the outer ring into this hole and push the button through the hole left (With the flange on the bottom to stop it coming loose)
Test the key and if it all works, then remove the button again and apply a small amount of glue to the outer ring and stick it to the key. (I used superglue gel)

Included is Button MK1.1 and Button MK1.2
MK1.1 will need some sanding on the bottom flange, whereas MK1.2 shouldn't.
MK1.2 has a rounded top to the top of the button.