Thanks, I'll look some up for the update. I'm trying to design one without a spawner for single player, too, but I'll definitely look some up. The orb looks really complicated, I really want it compact, so I'll look some others up, but thanks for the help + suggestions.

If youd like, I can help you with your mob trap, If looks like your doing the flooding trick, However, your trap does look a little small to be very effective. If youd Like to discuss it more Feel free to message me, and i can try working with you during the day.

You don't have enough spawning ground. You need a large room, not a tunnel. Dig water channels into the floor of the room to carry the mobs.

The rate of mob spawning is proportional to the number of available squares in your spawner. That's why you need a room and not just a corridor. Also, you gotta deactivate the above-ground area by lighting up the area above your trap with torches. Otherwise, hostile mobs are gonna spawn there instead of in your trap