Hi everybody, just purchased MOI a few days ago. Bought it (after a lot of homework) because of it's power and simplicity plus this wonderful forum. I'm very new to 3D so forgive me for what are no doubt very basic questions. I created a scale drawing of a part, saved it as a pdf and opened it in MOI. It opened fine, I then extruded it to the height I wanted. All great, except when I go to try and fillet some of the edges MOI just shows "calculating" and never completes the operation. I tried everything from one edge on the part to the whole thing. I used various modest radiuses (0.5 1.0 etc) still nothing. I've searched the forum for answers but can't see anything. Is the answer as simple as MOI just doesn't fillet extruded pdf's or am I missing something really obvious?