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Inheritance hierarchy for walls (and other elements possibly)

I would like to be able to create a base wall type from which I could then create new sub-types. Each sub-type would inherit all of the base type's properties and could override them and/or add new ones. This would be very useful for projects with many wall types where each type only differs in minor ways. Changing the type properties of the base type would automatically propagate to the sub-types, unless the sub-type explicitly overrides that property to provide its own value. This is very much like the family system with its type and instance parameters but walls are a system family and cannot be created using the general family system.

 

The inheritance hierarchy system would potentially save a lot of time especially in cases where accurate modelling of physical properties is required as a lot of the information would be entered only once, into the base type. For example, I could create a base type whose structure is 90mm framing. Then I could create two sub-types with different types of finishes: one with plaster board on both sides and one with strand board on both sides. Each of those could then be further sub typed to add other attributes, such as insulation for example. If at a later stage I decided to change the structure from 90mm framing to 140mm I would do it only once in the top-most base type and this change would be automatically inherited by all the sub-types.

 

Currently walls can only be duplicated and the copies are manipulated independently of each other. This leads to a lot of repetition.