Right now its a bit problematic with placing attachments.
a) you would need the avatar just in scale of default pose to be able to place the attachments at the right spots.
b) thinking of the future, if there ever were avatar uploads in different scales you would have a problem about the attachments, unless they were made for that specific avatar.
So it would make more sense to either zero out the attachmentpoint uploads at the location of the actual attachment point or have an menu for adjustment of uploaded items.. in the most basic form, probably just with translation, rotation and scale values.
Probably you guys are still doing so, since you mentioned there was still something on the list about attachment points, just wanted to let you know about this before the feature gets entirely rolled out.