complex assembly to house fixed size components. best parametric approach?

[RishiWorks]

Context:
Greetings, i am designing a case for an electrical device. There are fixed size sensor ports on the case and the internal PCB is standard dimensions. We are experimenting with various battery arrays and may need to scale down the overall size of the case to best suite users of the device. 

Question: 
Do you know of any best practices when modeling in fusion360 to best define, reference and link fixed constraints, that allow for ease of workflow / leniency enabling design variations?  Linked to context> Idea to  model all the fixed internals and sensors as components to then project / reference as much as possible.  It is a complex shape with compound curves etc. I have not had the best results in the past. 
Cheers

Thanks for your consideration and any shared examples, workflow or tips. 

[Beyondforce]

Hi @RishiWorks ,

Fusion has an amazing tool exactly for what you need and it's called "Derive".

https://www.youtube.com/watch?v=_tYCfuaagX4

Cheers / Ben
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[RishiWorks]

Thanks Ben. 

Pretty cool feature. Ill look into the best way to maintain opening and fixture sizes, as i scale the overall casing size. It seems it may be through using a parameter file derived rather than deriving in the actual parts and trying to project and fix dimensions from them.  

[TrippyLighting]

If the base design, the internals are of a fixed/static nature then I would not use derive but a linked component.

[RishiWorks]

Yes linking the components is certainly another option.  what makes sense to me most in my mind right now is to create a file and create prams for all the critical internal component geometries and use theses as sketch dimensions when sketching features. It would be nice to link the components and have them visually in the model, and link sketch dimensions to this ,but i dont find the project tool so easy to use for this, as i am unsure if the links are maintained going forward etc. For the sake of simplicity having a param file full of dimensions clearly labeled for each component will offer some fixed parameters.