Capture from Panasonic 1200A question

Do I understand correctly that to capture from Panaonic 1200A by way of FireWire, no additional FireWire stuff (drives, cameras...) should be hooked up on the same buss?

So...what if drives are used to capture to by way of say a FW800 PCI card?

What I'm wanting to do is capture with one mosheen, and move drives to another to edit without having to copy media from the internal Terrabyte RAID to other drives after capture.

Additionally, I've got a KONA 2 card I could put in and capture by way of SDI, right? Will that allow capture then to external drives? If so, roughly what's the file size difference between ingest thru FireWire vs. SDI?

Here's set up and thanks.

p2

G5 DP 2.5 3Gig RAM FCP 5.0.4.