Hi Oxford
If what you want is to control the stock of your final products that are sharing some parts automatically, so when any of those parts run out of stock, all the products that depend on it will be set as out of stock too, our Product Levels add-on can be used to achieve this,
If you want to test the plugin, you can do so at our demo site.
If you have further questions, just let me know 😉
Best Regards,
Salva.