Salva That's unfortunate but I was already expecting that answer after reviewing the multi-inventory plugin. Therefor I decided to go another route; probably too extensive to describe it here. ;-)
On another note. Yesterday I noticed on staging that you moved the static Product-Levels method is_bom_product from the ProductLevels class to the Globals class. This lead to breaking changes in our code. Are more disruptive changes like this to be expected in Multi-Inventory and Product-Levels in the future? We use both plugins a lot and customize parts of them to our needs.
All the best and thanks for those great plugins!