Well, you might believe it or not: these are small but valuable upgrades. :)
1) Did you also hit the A6's reset-button by accident when adjusting some settings with the wheel-knob - in the middle of a printig session? Then this is for you. The reset button is still pressable, but it takes more effort to do so. It is nearly impossible to hit it by accident anymore.
2) I was very annoyed by the standard piezzo-beep, foremost by its loudness. At first i thought of damping the sound by putting some rubber or foam in front of the beeper.
Then I started experimenting and found, that the hole of the beeper is an exact fit for some of the extra m3 screws, that come with the printer.
Important: Be careful when you screw it in not to damage the beeper irreversible. While you screw, test the noise-level by pressing the knob-wheel now and then. When the screw's end hits the piezzo's metal part, the sound is gradually tuned down. Exactly what I wanted.
Have fun and tell me, how the mounting went for you. These are very small things and tight fit, so it depends highly on your settings and setup, how well they will fit in the holes in the acrylic frame. Maybe you will have to readjust a bit.
P.S.: I am planning on remix this to a silencer with no need for a metal screw but with an integrated printed screw.