Thanks everyone. My other X-CANS has popped a valve and is living in the cupboard till I get round to sorting it. All I need to do then is get another set of legs and stick then on the bottom piece of granite and I will have a little tower. Each set of legs and granite place mat works out at £40. But you could make it £8 cheaper by just using three legs, as one leg in the middle at the back would have been enough. I went a bit OTT with the glue as well, so there will be a bit scraping to get off the over runs. I ended up over engineering it, if that is not to grand a term for such a simple project.
Now the controversial bit. There is no doubt that the X-CANV8P is better isolated as there is hardly any ringing noise when someone open and closes the cabinet drawers. But there is also an increased separation and ventilation between each bit of kit and I have the power and signal cables now totally spearate from each other. As a result the soundstage with the headphones has increased, more of the sound is outside my head and even sounds outside of the headphones.