Hello there,
how can I make a modification into part as marked red in this picture?
I have a much much complex part and just noticed that it needs to be reinforced with that kind of wedge (or how do you call that?). And I have no idea how to make it afterwards. So is it possible to add that later, so the overall dimensions and position of holes does not change?
Sorry didn't see you wanted to keep original length, here's another way you could also to do it.