These are flat replacement L1 and R1 buttons for the first gen PS4 controller (CUH-ZCT1). The buttons are not modeled to be exact replacements, they are flat and chamfered on the front, both as I wanted something that was a bit nicer to use, and to make it much easier to 3d print.
These require no supports at all.
These snap in just like the original ones, no controller disassembly required, and if you are careful, these can be installed by hand or with a small pry tool.
STEP and STL files are included.
These are accompanied by the L2/R2 Triggers here:
https://www.printables.com/model/780213-dualshock-4-ps4-controller-l2-and-r2-button-replac
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The author marked this model as their own original creation.