Just out of interest, what versions of Tcl/Tk/Itcl etc. are you using? Useful to know if we ever want to update our copies.

Right now stock tk/tcl 8.5 although I'd like to upgrade to 8.6

Not sure, we use an external CFITSIO and GAIA extracts all the WCS handling out of Skycat, so we never really use that code.

Hmmmm.....  Wonder what happens if we just get rid of it.....  I'll find out soon enough :-) :-)