Kuli,
LOL. I suppose using the giant nugget was a waste if a damn powder bag will do it. That's funny. When I got to that area of the game, I thought I was cleverly solving a puzzle by placing a specific object that just happens to weigh a couple tons on a floor tile. Oh well, I guess I'll say my guys were trying to shed some weight to fight the terror that lurked in the hidden room!
On the Ferro tip, I was pretty disappointed with the item he makes with the nugget. IMO, not as good as something else he already has in stock.