This is my take on the Lenovo Legion Go backplate created by whisperit. I have created 3 versions, they all have a smaller grill mesh so it looks closer to the stock grill.
The first version (complete version) has an external area for the SSD AND kickstand, also the ssd area comes with holes (2230/2242/2260/2280) to securely attach your ssd using a standard screw for nvme. Only single sided SSD are recommended because a double side could bend/melt backplate (unless you use a very high heat resistance filament). Finally the ssd cover has 2 holes for M3x4mm flat head or M3x4mm socket head screws to protect the ssd even more.
The second version, doesn't have an area for the SSD so it has a bigger hinge, close to stock look, this one is very slim and still has a ventilation area for the SSD inside the Go. There is also an option to use the kickstand with deckmate accessories.
The third version, doesn't have a kickstand and ssd area, this one is super slim and easier/faster to print/install. I was requested to add a full vent option, so it's here.
For the first 2 versions you will need M2x3x3.5mm brass inserts and also soldering iron with small tip (small enough to hold the inserts) or a 3d pen (or you can use something else to hold insets while you heat them up to melt the parts) to assemble the stock hinge with the kickstand. You can buy them from here: https://www.amazon.com/dp/B0B8GN63S2