Giá đỡ bàn phím đơn giản (Simple keyboard stand)

I created a slanted keyboard stand aimed at reducing the stress associated with keyboard input tasks.

Using this model, you can achieve an approximate 22° incline for your keyboard. Personally, I have found it increases comfort.

Both models A and B have been designed with hollowed sections to save filament, but as a result, the filament consumption ended up being higher. :(

I've also uploaded simple.stl, so please use it as needed.