Dan: By 'checkerboarding' I have assumed that this is when you have units in a second line that are deployed behind a gap in the first line, rather than behind a unit in the first line. So you get something like the efffect you would get if you look at the balck squares on a chess or checkers board.
Hugh: I am similar. I left Wales when I was young but in my case to move about 30 miles across the border. but as they say "You can take the boy out of Wales, but you can't take Wales out of the boy"