Also you can't change you're menu type the way you mentioned as of v0.10, that only leads to the Kaibutu school chase event now, but you can still change the menu by entering the school regularly, be it through the Sewers, the closed elevator that takes you to the alternate sewers, or Oreko's lab that takes you to the Alternate Sewers as well.
The Machine Effect can also be found a bit faster by going to Ghost/Flower world, then going south east two the pillars that take you underwater, going South into the deeper area, the south again into a Spike fence, then east too another Spike Structure then south from there through the other structure and climb down the stairs then into the door where it is.
And ogawd I lawl and all the names you gave the areas and structures, although sometimes it gets confusing...
But then again it's mainly since I named everything before...
Ogawd, I know several alternative Routes to getting many of the effects, I have the whole game map flow memorized so.... I shall pick it apart later