I’ve owned both Czech & Korean made and I’d say there was little to choose between them. The Korean ones are made in a factory set up by Stuart and as far as I know still only make Spectors (unless the recent sale of the company has brought about changes).
I’ve still got my 5 string Gibson but it is gathering dust. My return to 4 strings is linked to acquiring my NS NXT electric upright which is a 4 string model. Add to that the gift of a Spector Coda 4 and I am wondering why I ever need 5.
I had a similar request from an eBay seller Ona faulty foot pedal tuner. What was there to video, plug it in turn it in, nothing to see,it doesn’t work!