Elegoo Mars 3 Magnetic Bed Spacer
thingiverse
The extra space when upgrade to magnetic print bed make the Z limit sensor not activate when homing. This extending spacer help fixing it! the extender is about 2.6mm in thickness, so you want to change the screws to M3 8-10 the print bed i got was from amazon https://www.amazon.com/dp/B0B3T15P4V?psc=1&ref=ppx_yo2ov_dt_b_product_details but i'm sure you can get it other places
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