boltstopper

I designed this model because when changing the filament or more often: the "mmu2 error needs your attention" message appears on my Prusa mk2.5 s, I found it annoying when releasing the two bolts on top, they fell off when opening the mmu2 cover
this "topper" which can snugly be placed on the corners of the emu cover holds the bolts in place while it is still possible to screw or unscrew!
I hope you think its useful.
Thanks, Enjoy!