Sheppard: So, how easy will it be to put that thing in the other DHD?
McKay: The Atlantis's DHD is unique. It's not like there'll be an empty slot waiting for us to just plug it in.
McKay: Meaning that there may be some disassembly required.
Ford: You want to take the DHD apart?
McKay: I'll put it back together again.
Teyla: Do you not run the risk of disabling the other Stargate?
McKay: Only if I screw up, which is extremely unlikely.