....#.##..                                          ##..#.##..
......###.                                          .##...###.
......#.##                                          .###..#.##
#.......##                                          .#.##...##
##......#.                                          ...###..#.
###.......                                          ...#.##...
#.##......                speed hole                .....###..
..###.....                ^^^^^.^^^^                #....#.##.
..#.##....                                          .#.....###
#...###... turn  your walkman like a  turtle. there ..#....#.#
##..#.##.. might  be  something  there  that  looks #..#.....#
.##...###. like  a screw  hole  but it  could be  a ##..#....#
.###..#.##               speed hole.                .##..#....
.#.##...## the  rule  is   if   you   can't  get  a .###..#...
...###..#.  reasonably small screwdriver in there,  .#.##..#..
...#.##...          it's not a screw hole.          ...###..#.
.....###..                                          ...#.##..#
#....#.##.                 # usage #                #....###..
.#.....###                                          ##...#.##.
..#....#.# use  the  speed  hole  like a screw hole .##....###
#..#.....#       but with a tinier screwdriver      .###...#.#
##..#....#                                          .#.##....#
.##..#....                 # this #                 ...###...#
.###..#...                # adjusts #               #..#.##...
.#.##..#..                  # the #                 ##...###..
...###..#.               .# pitch #.                ###..#.##.
...#.##..#                                          #.##...###
#....###.. some cassette players have speed  screws ..###..#.#
##...#.##. but no  holes for them.  to get to those ..#.##...#
.##....### screws  you   need  to  dissasemble  the ....###..#
.###...#.# whole   thing.   could   be   worth   it #...#.##..
.#.##....#                                          ##....###.
...###...#                                          .##...#.##
#..#.##...                                          .###....##
##...###..                                          .#.##...#.
###..#.##.                                          ...###....