>>96365042
NTA.
LBB3 explicitly says that a good dungeon should have new levels under construction, and that Castle Greyhawk ALWAYS has AT LEAST two new levels under construction at any one time.

>LBB Supplement II has a dungeon in it. It's finite in size
Are you sure? The Temple of the Frog has a passage leading off into the unknown from room 16 of dungeon level 2.