Should a part with a lot of bodies be a sub assembly?

I am modeling an acoustic guitar and i have the top, sides,and back as separate parts in the assembly - but the fretboard is apart that contains all of the frets (20) bodies in one part.

If i hide the fretboard that contains all the frets as bodies i canwork on the assembly.
but if i try to work on the frets everything comes to a standstill.

Should the frets each be their own separate parts? Or a subassembly?

Thanks

Im willing to try and attach the file if anyone wants to have alookSolidworksAssemblies