Nifty
I've just done mine, dead easy;
I put a fan heater on the cockpit floor for about an hour. this warms up the column outer, column, bush and all the works. Obviously after releasing the middle clamp, just pulled steadily using a good bit of manual handling technique and it slipped out a treat. The trick, if you can call it that, is that the rubber was warm (40 deg C or so ) and so was nice and soft.
We know it works for tyres.
Putting the new one in was slick, using a dollop of silicone grease and warming it.
I did play with the idea of taking the steering lock collar off the old column and welding it on the new (Caterham) one.
But only for a little while.
Susser (Manual Handling Instructor )