anyone done the other part of this quest by taking ED-E to the "other faction"?
Yes.. I took him to the "others" (not sure why you don't want to mention what faction it is, but I'll play along!)
It goes pretty much exactly the same way, except that he gets an upgraded weapon instead. So, either improved armour or an improved weapon.
And yes, ED-E is a great pack-mule
And he doesn't do enough damage to steal your kills either. Veronica is very effective in combat if you give her a good 'punching' weapon, but she has an annoying habit of running right into your line of fire!

