If it’s that the one, just make a circle. Draw a rectangle at the edge of the circle and make 2 copies to rotate around center axis of the circle 120 deg. Loft it. Select the top face and scale it down. Quick and dirty.
Use the sweep tool. Make a profile of the chamfer “cut” you want to make and subtract it from the case to create the button.The button and the case are one. I think you are treating them as 2 separate items?
I‘m working on a new case for the Controller of our sun shade.
The original one is pretty brittle and already lost two buttons and the clips that hold the PCB in place are mostly broken. It consists of two parts, one mounted to the wall and one that hold the PCB and can be taken away from the wall mount.
The spare part is pretty expensive; around 45€ + shipping, if I remember correctly. And that is just the part that holds the PCB. Of course, realistically Designing it myself is way more expensive but I‘m doing it for the challenge
I still have to figure some things out and maybe change some parts to have no need of support structures for the printing process. (Or get to know how to selectively place it).
Also how to do Text in Shaper. I found this thread and it sounds promising:
Edit: For now I haven‘t done much PCB-designing, just one that I haven‘t finished yet and is mostly done, Maybe I‘ll finish it some day but that’s a whole other project