cartreader/extras/pcb/README.md

cartreader.zip is the main PCB, if you order it from JLCPCB you can combine shipping with your parts order from lcsc.com. Default settings are fine, just select the color you prefer and off you go. If this is your first order from JLCPCB you should only pay $2 for 5 PCBs.

adapter_pcbs.zip are additional PCBs for writing flash- and eproms like the 29F032, 29L3211, 29LV160 or 27C322, PCB thickness needs to be changed to 1.2mm, this is very important or else it won't fit into the SNES slot. It's best to order this design from Elecrow as JLCPCB will charge you $16 extra for 3 designs.

With the sd_adapter PCB you can transform the microSD module from the parts list into a full size SD module by desoldering all the components and soldering them to this PCB. This is optional since you can also just mount the microSD module as is.

For Oshpark you need to rename filename.GML to filename.GKO or it won't find the board outline. Oshpark is great for ordering the smaller PCBs but very expensive for larger boards.