These are the pulley cases that we have been using on all of our Rev slides. We have used them for prototypes in the Res-Q season and the Velocity Vortex season and we use them on our robot for the Relic Recovery season too.. These cases are simple to assemble, requiring for each pulley:

• One of each 3d printed part
• 2 M3 screws that are long enough
• 2 small M3 washers - They have to be small enough that they only touch the inner ring on the bearing