Hmm.. I did a Magic 3.0 install on my friend's non-gap V4 ps2 and watched the intro to Kingdom Hearts. Guess what? No freeze. His son said he started a new game a few days ago (I modded the system 2 weeks ago) and he played 7 hours and it didn't freeze. So it looks like I'm going to try out my magic 3.0 in my V5 after all with no switch. Maybe I got some chip with updated code at the very last minute. It appears to be a genuine Magic 3.0 with the white resistors and isn't shaved off at the top of the printed circuit board. Price on the chip was damn cheap too.
-amptor [Current favorite game: Raiden III]
V5 NTSC/USA PS2
Upgraded from Magic2 Clone -> Magic 3.0 -> Magic 3.1 -> Duo -> Crystal Chip
Factory Sealed V10 NTSC/USA PS2 (Backup System/Collectable)
Factory Sealed Crystal Chip
Romeo Laser Mod Planned