Too much material for any jigsaw but a very pricey Mafell.
When I make molds, I make a pattern from something like 1/4"
hardboard which I screw to 3/4" layers and make a bunch
of duplicate layers from the pattern using a pattern copy bit
in a router. In your case, you would draw a line from the
pattern, jigsaw outside the line, screw the pattern to the
part and trim with the router.
Layers can be kept aligned when you glue them up by
driving positioning screws or air nails.
When I make molds, I make a pattern from something like 1/4"
hardboard which I screw to 3/4" layers and make a bunch
of duplicate layers from the pattern using a pattern copy bit
in a router. In your case, you would draw a line from the
pattern, jigsaw outside the line, screw the pattern to the
part and trim with the router.
Layers can be kept aligned when you glue them up by
driving positioning screws or air nails.
