Hi Runaway,
No I have no other caps. I just have a bag of 0.1uf... Remember just needing 1 for another project, and it was just as cheap to order 100 from eBay as it was to pop to Maplin.
The 12V is a wall pack, but again it's a cheapy ebay one. The 12V in is reading ~12.24V on the DMM.
I haven't tried doing any readings when I'm adjusting things. All the reading were done when idle. I'll have a go later at taking reading as I'm moving things. Need an extra set of hands and wait for my housemate to come home.
Cheers.