Hi Scott

Thanks for the bug report.   The amount of unfinished work is clearly excessive : )

Almost no GRC and XML work has been done so far, that I know of.  Some of my early hacks may have ended up in git, and it sounds like these issues may be caused by that - I'll have to take a look.  One of the problems is all of those blocks are fairly low level and we need to wrap a lot of that funcionality into GNU Radio hierarchical blocks written in python.  These are typically set up as modulator / demodulator blocks which combine channel filtering, demodulation, slicing, etc. into unified functional blocks.  The latter are the ones that should be exposed to GRC via XML....

Max