Hi,
First thing - getting a Catweasel Mk iV is very tricky these days. They've not been made for a while now.
Secondly - don't worry about power. The Catweasel Mk IV is a PCI baord. You just need to power the floppy (from the PSU).
Thirdly - I believe Catweasels and Mitsumis don't play together nicely! Use Teac, Sony, that sort of thing.
Lastly - I suspect it won't work under Windows 8 anyway. You'll almost certainly need to disable "Enforce Signed Drivers" and Win 8 has only given me trouble when it comes to even slightly unexpected hardware.
The best platform for using a Catweasel is with an AmigaOS 4 machine, even though it's not officially supported. But then, I would say that, wouldn't I?
