there is an easier way, go as far as the first post, then remove the nut & bolt at the bottom holding the steering column to the rack universal joint, and pull the whole lot out complete with the column. Then with a bit of fiddling you can undo the ignition switch screw & swap it over, then put it all back together

If you have to remove the adaptor, you can simply bash the steering column at the top with a hammer, with the ign lock housing butted up against a vice or something. This can also be done with it on the car, as the column is collapsable it will slip out from the middle of the adaptor. Then grab the column and extend it again!
Don't thank me for that last tip, I got it from mr vdub in the MK2 section
