I created model of keychain(my homework), I wanted to enlarge a little my model, so marked model and in draft clicked on scale icon, then all factors in scaling to 1.50 and checked create a clone, then I deleted original model (leaving only that clone), but I can’t create pocket in this one, and when I exported as .stl and import in new proj and refined shape, etc (from here https://youtu.be/HbtKFmz5p00 ) it still has sth like meshed triangles on each surface,
so I can’t select fe: top surface and add circle here.

Could anyone help me? I hope there are a few better ways to resize objects to still be able to fully edit them..

Thxank You