The original post is from https://www.reddit.com/r/framework/comments/qtxqa4/diy_fullsize_sd_card_expansion_card/ but as seen from that OP's photos the SD card PCB is not flat on the printed part due to some electrical components on the underside. This is in addition to the card not having a top cover, making it relatively unsightly in my opinion.
This model simply edits the framework's original expansion card model to have a top cover and space for the underside of the PCB. Simply superglue the modified SD card reader (follow the reddit post's instructions) into this new case, glue the top cover, and it's good as new.
The author marked this model as their own original creation.