I highly doubt you guys didn't wipe once, Maybe not IN EV but IN KP give me a break for somebody with your level of experience that you claim. there is no way you one shot, fabricator being under-geared. Plain and simple. The only way you could have no wipes is if you ran with 6 other people in full Rakata gear/Black Hole gear and people who knew each fight like the back of their hand.
I don't care how much you communicated to each other something is very fishy with this post.
fabricator is easy with an experienced team running the puzzle, then tanks just have to know how to taunt off (duo tanking 101) and you're doing. don't have to deal with double stacking buffs and debuffs like HM/NMM