shaunpiosalan The material is incredibly brittle. It shattered when trying to eject it from my device. After digging the pieces out the slot was damaged and my phone ruined. With the material used it's not safe to insert no matter how spot-on accuracy of the design.
As for accuracy the only serious problem with was the SIM card slots being too small to fit a SIM.
shaunpiosalan I know that people are still trying to enable the second slot, but has this one been tested and confirmed to fit? There are at least 2 other sellers of 3D Printed Dual-SIM card trays that aren't accurate enough to fit in the phone.