My runner planks’ core material is samba wood also known as abachi. When you google for most common applications you will not find iceboat’s runner plank. Strange.
It is very light wood and easy in processing however it covers everything in dust even if you have dust collection system.
The lightest wooden core ever was 2,54kg, the heavies 4,55kg. In average core weight oscilates between 3,4-3,6kg in most of the cases.