I need to stack some laptop chassis - and with the original feet, they tend to slant a bit to the front side.
Since over the back feet the laptops are 17.75mm high, and over the front feet it's 14.5mm, I adjusted the height of the provided model by a bit to level them out.
Printed mine in TPU 95a to closely match the original feet, but PLA should also work fine.
Affixed them to the bottom shell with superglue.
For a non-permanent solution you may also use thin double-sided tape (which is what Lenovo's using from the factory).
The author remixed this model.
Taller foot section for levelling out the laptop chassis when on a flat surface