Great guide, thanks for taking the time to do this!
Here are a few notes from my experience:
#1 In Walkthrough1 of Extra, there is one decision missing, its probably between line 5-10.
#2 In Walkthrough1a of Unlimited, again there is one decision missing near the beginning.
#3 In Walkthrough1a of Unlimited, there are 5 options missing right before the Save3 slot. I believe you just have to visit each of the 5 girls and it is only asking you what order to visit them because each time its the same list minus the one you picked.
When I was in doubt, i believe i just picked the top option each time and i didn't run into any issues. Last but not least, I clocked about 5 hours.