the cluster has some kinda screw protrusions around the edge [forget just where] that will take some gentle prying to get past them - it's a very tight fit, but you're not likely to damage anything, just get mad

and either make sure all the wires are off, including the dash lights, or careful you don't suddenly pop it out so far ya rip a connection off .... seems I remember it working best to get either the top, bottom or one corner out first, just fergit which
the signal cup has a wedge piece that the screw jams against the column and they wear to the point they're too smooth to hold - they're available new [Old Car Centre has'em, #54-13340W], but usually a thin piece of rubber slipped in behind it will work, just means taking the wheel off to get it in there
Bill