Converting edged solids into rounded shapes

Hello, all

Here I’m to ask your opinion on most easy and comfy way to manipulate my geometry. I’m also adding an image to describe it well. I just wanted to have these rectangular shaped cutouts turned into oval and rounded gaps. Thanks very much and please see my image.

use the command UntrimHoles on an edge of the rectangular hole you want to delete, or in case you want do delete all anyway use UntrimAll click on the front or back face of your structure and hit enter that will delete all the holes. then extrude the rounded shapes with option solid and use BooleanDifference with option delete input.

Hello - if you get the radii set just right, FilletEdge on the short ‘vertical’ edges mat do it.