The family has a knack for clear visual communication.
Big chainsaws are plentiful here because of the timber industry. The area has valuable hardwoods sought by Malaysian Chinese traders.
The traditional method of making sago starch is to fell a sago log and pound the insides with wooden hammers until the starch grains are separated from the fibers. I've read that even that way, it's 1/10th as much labor as rice cultivation. With a power tool like this, it would take very little time to produce large quantities.
"Pandai Besi" means "blacksmith" in the Bahasa Indonesia language. Just like our word, it literally means "iron pounder"