Side Insert Panes M4

As I had inserts panes that wouldn't fit M5 nuts (like those https://fr.aliexpress.com/item/1005006619246406.html?gatewayAdapt=glo2fra), I've remixed the design so that the side inserts holder could take on M4 nuts, and in doing so M4 inserts.Add a drop of loctite to secure everything in place.Everything working fine on my end, feel free to improve the design (what would be best would be a parametric design).