The Old Ebonheart IC quests requires 5 pieces of scrap metal. In Bthung, one finds only one piece, plus random loot from non-respawning critters. In the ruin near Andothren, 3 pieces plus same. Not good, particularly if the player has sold or used some pieces in alchemy. The closest place with respawning centurions is far away (Leftunch Redoran territory). I would make some of the critters here respawn or put hide more scrap metal around.