Sliced at .12 mm layer heights. 

PLA

no supports

insert a 8x3 mm magnet 

i used one of these:

https://www.amazon.com/dp/B0CDGYTLH6?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_8

you need to add a pause to the print to insert the magnet

Custom G-Code to insert at Layer 32 For .12mm layer height. 

;LAYER:32

;----PREP FOR MAGNET INSERT----

G0 Y200

M300 S440 P200

G4 P200

M300 S440 P200

G4 P200

M300 S440 P200

G4 P200

M300 S440 P200

G4 P200

---

M0

;RETURN TO FINAL POSITION FROM LAST LAYER

G0 X112.5 Y127.636

Want a custom embossed stopper? leave a comment and ill try to get a model uploaded.