Hi PP,

> Maybe I can get a good result with a few tape measure for
> the mains distance and then, set sizes approximatively.

That seems like a good plan. You might measure just some of the largest things and then once those are set up it would then be easier to have other many of the other things judged just visually.

You'll probably find that it will get easier to make approximations as you do it more. If you don't feel confident about any particular thing then you can make a measurement.

Let me know if you get stuck on how to change an object's size.

- Michael