Another one that I started and finished today, sorry the file is a little large.
https://www.dropbox.com/s/pz2b65c6xrzl6dc/dbs_rebound_b9.bsp*Edit: Updated with a few minor details.
**Edit 2: Widened the spawn hole thing.
***Edit 3: Removed the middle pipe and raised the spawn.
****Edit 4: Hopefully fixed the spawner to where it points up now.
*****Edit 5: Because I forgot the lighting.
******Edit 6: Fixed a few logics.
*Edit 7* Added secret.
Edit 8: 1 nuke