Didn't we go through this about the same time last year??? j/k
Sounds like you may have done this already, but, you need to remove all internals from the signal housing first.
If you still haven't found those little bolts you were told about, they will be towards the outer edge of the signal housing, I think they are at 12 and 6 on the dial (it's been a while since I tore through an EB column...) they will be 7/16 or smaller.
You need to find them and release the square nuts from the slots behind the collar in order to remove it. Loosen the two bolts when you find them, they do not need to be totally removed from the nuts, just loosened. You will feel the signal housing get loose, wiggle it and try to remove it, if it still doesnt come free loosen the bolts a little bit more.
Until you get the housing off, I can't be any more help than that....
good luck, and patience young Luke...