Hi @AlexBap8588: let me ask you a little off topic question: Has you considered apply the same modifications on other planes like the Waco WYMF5? I’m thinking jump into the Air Mail routes mod with it, but right now I can’t enjoy another plane without your engine management modifications.
At the same time I’m searching cargo routes for the beech18 too 
But I think for the mail mod, the Waco is more appropriated.
Thank to you I’ve almost gave up my Caravan in FSEconomy. And I need it for earning enough money for buying the Beech there 
Best regards.