Yes. Now that the character is exporting properly I am able to select lower qualify settings and all works well.
Seems the big issue was:
- Turn off the Auto Hair LOD for the skin (as little sense as that makes)
- Install the clothing into the exact subfolder specified on the product page (for the clothing)
Finally, I used the export option , not the Assemble button. I think the export button is solely for DCC use so part of some other pipeline, not for use in the project directly. Guessing it is for making clothing and just getting proportions rather than building the character for use.
TL;DR I would say just don’t use the export option. Job done 