The number of Model Expansions to be added is not limited.
As of September 2023, all Model Expansions for MODEL JUPITER-8, JUNO-106, and JX-8P can be installed in addition to the SH-101 pre-installed on GAIA-2.
*To switch between the Model Expansions installed, hold down the [MODEL] button or press [SHIFT] + [MODEL] button.