I sanded the work area to get ready for the bulkheads to go in to finish the baggage areas. The cardboard I used work very well as a template by cutting and sanding to shape for the peaces to be cut from. The pieces used came from the 4x8 sheet of foam used for the fuel tanks ribs and bulkheads that was glassed up 7 months ago. The pieces were sanded to fit due too the foam was ½” thick and the cardboard was only 1/8”. I then cut the UNI for the next day to be glassed into place.