Long, long ago, there were actually Bottlehead kits that shipped with OCCC hookup wire. At the time, it was covered in clear varnish, which meant you needed a solder pot, sharp hobby knife, blow torch, etc. to strip the wire before hookup. The stuff from VH Audio is so much easier to work with, it's actually one of the only wire types that I like a little more than our teflon insulated wire.
This wire would be a good choice for the Crack. There is absolutely no benefit to using it to replace the red/black twisted pair of wire that goes from power transformer terminals 4/5 to B7/8 and A4/5/9. Those feeds are high current feeds that are not carrying any signal current, and using the wire there would be a waste. Otherwise, I say go for it!
