The button I could find on the internet for the FB-354 (not FZ-354) was supposed to be glued in place according to an ebay ad I found for it.. Not good enough.. Not good enough at all..
Totally reworked the model but let's call this a remix.
Print with 100% infill and supports on print bed only.
Turn the sound on to hear the satisfying sound of when it clicks in its place and off again. :D
Enjoy!
The author remixed this model.
Total rework.