Wow.
Thanks for the replies guys. Some of it is way past my current knowledge. However I agree with Alex about the timing accuracy of this device being as good if not better than some commercially available. The total cost of the three main boards came to £35 so worth the risk.
My Polish is non existant also. However if you open his web page (http://smopi.news.nstrefa.pl/index.php?pages/Video-Time-Inserter) in Google Chrome it will offer to translate the page.
Thanks again.
Tom Moran