had a bit more dig about this morning and found an old closed mythtv bug report for the "Failed to set TS filter" error which stated that it was a driver issue - <a href="http://www.mythtv.org/pipermail/mythtv-commits/2006-November/023383.html">http://www.mythtv.org/pipermail/mythtv-commits/2006-November/023383.html</a><br>
<br>Found and used the information on this page <a href="http://www.youplala.net/linux/home-theater-pc#toc-not-losing-one-of-the-nova-t-500s-tuners">http://www.youplala.net/linux/home-theater-pc#toc-not-losing-one-of-the-nova-t-500s-tuners</a><br>
and reduced the tuner delay down to 150ms per tuner and changed "open DVB card on demand" to selected.<br>Going to give this a go and see what happens today.<br>