@charly2008 said:
That's what components are for, anything repeated (or mirrored) make a component and reuse it.
Thanks for image. Did you use intersect with model when you finished placing of the component?
What I said is, that If I use Round corners, there will be some deformations in the whole. So you need to separate into 4 pieces the component, which you just created! And that seems to me complicated. If I would use round corners to your component, I would need to do 4 times same changes (corrections of deformed faces and creating new soft edges).
Maybe I should do it in the way that I will place two planes onto the component and I will divide it with intersection to get the quarter, which I would change to component and duplicated 3 times to create completed hole...