@Rogerlj
If you are intent on manufacturing your design you will need to do as @Victor_Shapr3D suggests, place the components in separate Designs
Please bear in mind that the following was created to push S3D to the limit, all software has limits and the viewing aspects mentioned below, apply to all software.
This may be of interest and hopefully somewhat helpful:
https://discourse.shapr3d.com/t/faster-way-to-copy-things/5381
On the subject of Threads I found the reasonable limit to be 1 Metre of 10mm Threaded Rod [AKA All Thread].
However displaying it is a problem, just like the Gate Panels in the linked Thread above [i.e., as in Shapr3D Forum], where on a standard ‘large screen’ it could be a simulated presentation:
There is ‘some’ detail but you have to get close, well closer than this:
Clearly there is little point in producing such an object when with a top end iPad it takes about 30 minutes to load the .shapr File. The latter is essential to witness the detail and IMO you have to get closer in than this to see it at its best:
IMO on performance, price and creative input S3D is THE one to beat.