Service Plan Hours

Projects have labor types for installation labor.

Would it be a good feature to have separate maintenance/service plan hours for products that will be added to a service plan from the project?

The calculated percentage option is there; also, any custom field can be used for service labor price, but the labor hours are going to be left behind, and for a service plan item, if we use a calculated field, there can be different products with different service hours, and service price calculations associated with them.