Thanks Dave, I will try to do it with proxys.

The intresting thing I recenty discovered is, that in the unsmooth polygon mode in the viewport, my metalfrets and the fretboard stay attached to each other.
Just when I smooth it everything seperates.

So either I let it unsmoothed or I add that much divisions in length, that it doesnt deform that much.

Thank you guys for the help! Appreciate.

Happy Holidays and a happy new year