Thanks for that shady, I'll have a look at the Mingardi stuff just in case there is something appropriate, although, I think AXA do 24V stuff as well, so I'll check. I didn't think of using the dbmz actually, that is quite a good idea.
The reason I'm looking at the AXA motors is that they can be used on low voltage power supplies as well as that gives me some much easier and tidier options for routing the power underneath the external roof tiles (I'm pretty sure that would be against building regulations to do the same with AC power lines!!), but that's all.
I've already got the SQ Blaster just because I think it is an elegant addition to my vera systems and I really like the iphone app as it is so customisable.