This little gizmo attaches to the ball trough under the apron. When you raise
the playfield, the flag pops out and keeps the balls in the trough, instead of
dive bombing your plastics. The design works for most WPC games.
 Here
it is in the down position. The balls can get out of the trough. |
 And
this is the up position. The playfield is vertical, the camera is
contorted but the magic of computers makes the trough look level. But
you can see that there is a ball trying to escape, but held back by the
flag, which has deployed under the force of gravity. |
 First,
remove the apron. Here you see teh ball blocker, waiting to be
installed. |
 Remove
the highlighted screws, and the trough post. The ball blocker flag will
replace the post, so put the post inside the machine for safekeeping. |
|
Now,
put the ball blocker over the trough holes and replace the screws. Put
the apron back on, and you are done! |
 |
| |
|
Here
it is in the down position. The balls can get out of the trough. 
And
this is the up position. The playfield is vertical, the camera is
contorted but the magic of computers makes the trough look level. But
you can see that there is a ball trying to escape, but held back by the
flag, which has deployed under the force of gravity.
First,
remove the apron. Here you see teh ball blocker, waiting to be
installed. 
Remove
the highlighted screws, and the trough post. The ball blocker flag will
replace the post, so put the post inside the machine for safekeeping.