Episode 39 Bujilli and Leeja crossed-over through a secret Weak Point to Idvard's Keep located in the midst of a drastically reduced and ruined version of Wermspittle on an Adjacent World. Here is a side-view of Idvard's Keep. Please keep in mind that this is a work-in-progress and mostly just a sketch. I still have a lot of work to do on this before it's ready for prime-time, but it should help clarify things for now.
And here is a quick diagram of the Portcullis arrangements...minus the murderholes, pit-traps and so forth. Also the Spiral-Ramp to Sub-Level 2B is locked and should be obscured by a clever bit of camouflage, but accumulated dust and debris has made the access-way fairly visible to anyone taking a few minutes to give everything a good look-over.