Topology data is the data checked by the 360.
It's patched in games for LT 3.0 firmwares to make it stealth as well as bootable.
Games without topology data won't boot.
Yes, it's better to repatch and reburn them (unless their already properly patched, just run the burned DVD through ABGX)
If your console is at 12xxx then I wouldn't update.
Seeing the 13xxx updates will reflash your DVD drive.
if you're on 14xxx then it's safe to update.
Also, you could, if paul is still willing to flash it for free, send your drive via the mail.
That is if you can disassemble the console yourself ;p
I also flash drives for people in Europe and that's pretty much the only way I do it.
So topology is irrelevant if running Lt 2.0?
Pretty sure majority of the games went through abgx to be patched. And does this patching only mean to be safe from live ban?
Out of curiosity, if the drive was send to you Tuesday, when will you send it back, postage being covered? How much is postage?