I did the hotswap using Ndure3.0. I used an ndure script upgraded and converted to the newer script ~10kb from Instructables.com.
Everything was going smoothly until step 2 where I got multiple (~8) errors: "cp: Read error: Input/output error"
I booted up my xbox and I believe I received a error 16.
Is this caused by a bad burn from my ISO? I used Image burn and Office Depot CD-Rs.
I managed to restore it, so it's working again.