I was a little worried about pulling my ramps off Tron for the first time, but really wanted to clean up the orbit, gem and quorra shots. Lots of dirt that I couldn't get to.
Took me maybe an hour and a half or so from start to finish. Not sure I did it the right way, but I just dropped the bulbs out of the blue and yellow ramp flashers and unscrewed the ramp switches and left on playfield. Worked out well for me (I assume that's the right way to do it)
Regardless the outcome was good for me. Gained some experience and my lanes are clean and faster than ever (not sure that's a good thing, lol)
Anyway, if you have a Tron and it's dirty under the ramps it's not too bad. If I can do this, you can too. Was worried about creating a permanent ball track if I didn't clean it.