Thanks Charlie, I just posted on the Fredo Portrait thread, I think my message is being currently reviewed.

In the end I did get in touch with the SuSolid software designer David Malnar, and he sent me a new copy of the plugin. All working now Once again, I thoroughly recommend SuSolid for anyone who's exporting STLs from Sketchup for 3d printing. Cheers, BP

Yeah, thanks for those settings, srx!!! I reckon they've really sharpened my screen up!!

If it helps after so long, here's the model with the Simplified Chinese text intact. reedplates-text.skp

Thanks for the explanation. I did wonder what it is you are drawing. I'd never have guessed it was for a musical instrument. Cheers.