List of attachment points?

Can anyone provide a list of attachment points? All I know now are:

origin
overhead


is there any others? For example, I need to attach a special effect to the ground below a flying unit.. what do I use? (origin attaches the effect on the feet of the unit)

I found this on www.gamefaqs.com a while ago:

"Oddly enough, Blizzard didn't supply the World Editor with a range of
values to choose from when selecting where a Special Effect is
attached. So, here are some valid string values...

overhead
head
left hand
right hand
chest
feet
origin
weapon (applies to heroes only)"

heres some too

Attachment Point Names:
overhead (floats over the unit's head, but doesn't sway with
the head as it animates)
head (sways with the unit's animation)
chest
origin (usually at the base of a unit's feet)
hand
foot
weapon (for heroes)
sprite (for buildings)
medium (for buildings)
large (for buildings)

Attachment Point Modifiers:
left
right
mount (for mounted units)
rear (for quadrupeds)
first (for buildings)
second (for buildings)
third (for buildings)
fourth (for buildings)
fifth (for buildings)
sixth (for buildings)
rallypoint (for buildings)