Hi,
i need some advice on how to make a tunnel hole for inserting a 1.5 mm carbon rod in a sheeted foamcore stab.

Just heating up a metal rod with open flame does not appear to be a great solution, as the wire would cool quickly and i would have to insert the wire several times making the hole larger at the beginning...

is there another simple way to do it without making/ buying sophisticated and expensive hardware?

Thanks for any tips!