Project 1999 - NPC Spawn Issue: a goblin headmaster in oot (various sol ro quests)

The spawn a goblin headmaster (drops pieces for 3 sol ro quests) in oot spawns every 18-20 minutes approx on p1999.

http://eqbeastiary.allakhazam.com/search.shtml?id=2556
Several posts reference it as spawning in a much shorter amount of time:

Apr 26 2000

Quote:

He also respawned alway in the same place. The spawn rate was around 5 mintues.

May 27th 2002

Quote:

Spawn time is very short, 5-7 minutes at most. I camped him for less then an hour, had a headmaster spawn every 3rd pop or so.

and a couple other more recent ones.

Thanks for any help.