Triangular grid in EIRENE related to the quadrangular grid (but taking larger volume) in B2 should exist parallel with the original B2 grid (covering the confined and common SOL region). They currently can only be treated as separate "occurrences" of each IDS. We would prefer to have the possibility to store multiple GDD objects within the single IDS occurrence.
The "extended" grid of the SOLPS-ITER covering all the volume down to the wall areas is a 3rd thing.