We use one base for each of our clients. We are doing a big effort to standardize the structure of all bases because we are many on the team and each person has edited the structure of the tables and fields to achieve different goals.
Is it any way to have a main base where if I do any structure change it reflects this change automatically in the other bases? I'm not talking about sync records, our records are all different depending on the client. I'm talking about the settings of the table and the fields.
Unfortunately, no. The best way would be to combine all you bases into one. If you would like to discuss this further, I can give you ideas on how to do this. Please schedule a (free) half hour with me using my Calendly link: https://calendly.com/bruce_consulting