FlashForge Creator Pillow Block EZ install

This modification of Crowell's pillow block adds a slot in the base such that once the bearings are slipped onto the shafts, the pillow blocks can be inserted or removed without disturbing the shafts or pulleys or alignment (much).
Two slight ridges are used to hold the bearings in place, such that flexing the pillow block should be enough to free the bearing for insertion or removal.
This makes it much easier to experiment with slight changes to pillow block dimensions or designs.