Once you have all the sheets together you can take them away from the grid and glue the gray semicircle cardboard, I did it with the hotgun and didnt take away the metal sheets! Like this you don't melt any other plastic sheet unterneath

Once you have all the sheets together you can take them away from the grid and glue the gray semicircle cardboard, I did it with the hotgun and didnt take away the metal sheets! Like this you don’t melt any other plastic sheet unterneath