I have been thinking on this for a while now, ever since they told me there is not a job built from tube that cannot be replicated in system built in half the time. The biggest obstacle has always been cost, we have invested 13 years in tube and some system and can't just throw that away to start again. One supplier has now offered a sort of trade in deal to switch to his system and I wondered if anyone else has ever considered it or better still, ever done it?