I bought a motorized window opener set from aliexpress.
When I installed it, I found there is no switch box mount cause it was designed for install inside the wall.
But I want to mount it on surface of wall. So I needed box style mount.
Switch box is 86 mm x 86 mm size.
I think that you mount this with 5mm screw so each screw hole need more strength.
So set infill 30% or more.