Understood and thanks to both of you for the clear explanation! I wouldn´t like to burn more hp by adding a second PSU, so it´s either a beefier one or something completely external. I didn´t find too many module-based PSUs that offer substantially more power then the Arturia version (granted, at least they come in 4hp). Those torroidal transformers found in bigger cases come to mind,as they might allow for two smaller cases to be powered from a single PSU.

But I´ll give the cheapest option a go first, maybe I can rearrange modules and get around limits.