I have a sheet metal part 200mm wide x 1800mm diameter 0.75mm thk. The part has slots (done with hole wizard), 2 rows, and a relief in the middle. all of these features were put in on the flat pattern. Two problems are appearing.  First the features become suppressed when the part is folded. Second, center marks cant be put on the slots in the detail drawing. Any help on both or at least the second issue is much appreciated.

-Mark