Global scaling in skp 8

[artmusicstudio]

hi,
i got an model to work on, which is oversized (factor ca. 20,4243). when i want to scale it (measure tool and entering a length),
sketchup reports, that

components loaded from external files will not be scaled (free translated).

so is there a way to scale the whole thing without doing it manually with the scale tool?

thanx stan

[Box]

Select all and use the scale tool.