bulkhead scribe tool

Here's a simple scribe tool that I use to mark the final fit demension of the bulkheads. I place the bulkhead where it's supposed to go; then I run this scribe and mark the bulkhead on both sides by keeping the block up against the inside of the hull. The small block of 3/4 in foam is the same thickness of the foam bulkhead mounting strips so once the bulkhead is cut along this line, the bulkhead will fit perfectly against the mounting strips.