more like hanging a picture on the wall - although I'd like to see a photo of the end result if you try it building timberframe house hard - I'm trying to find the doc that came with it. Had a sentence which described the movement perfectly.

I guess with the trinitron type it works because if you cant get focus back with the various alignment methods, it implies that something may have moved over its lifespan and this definitely joggles something.

(But I don't want to be phoned up to be told it exploded when the hammer went straight through the casing:-))