The metal dome contacts in most Atari 2600 / 8 bit computer joysticks will go flat with decades of normal use, or boards need contacts cleaned etc you all know the potential controller issues. Course the darn things are taped down, so cleaning or replacing them can be tricky and a week later the damn things move around a little and your back to square 1.
I am making is a drop in replacement circuit board that uses tactile switches and does not require trimming / cutting / filing of the original plastics, it will fit in CX-40 Atari brand joysticks
NOT the older CX-10 models with the black plastic plate and springs!
I am using ultra low profile C&K tactile switches that match the depth of the original snap dome contacts (about 0.55mm), that are soldered in to place (no sliding contacts) and are rated for 1,000,000 cycles (MTBF) and only require a phillips head screw driver to install
And they make a little clicky sound