Thanks Paul.
Apart from accidentally getting a loose strand in the wrong place, what's wrong with using stranded wire?
Stranded wire is made for applications where the wire will move a lot and needs to not break because of that. Wires in the Crack chassis do not move once you finish the build.
Stranded wire doesn't stay where you put it. You'll have a really, really hard time making your build look halfway decent when all the wires you install move around all over the place on you.
Yes, the strands will poke around and go places that they shouldn't. This should be enough of a reason not to even consider using it. Lots of people just say that they will tin the ends, but once you do that it's really hard to crimp that around a tube socket lug or a terminal strip.
It's really way more trouble than it's worth, especially considering that there are plenty of solid core wire options out there.