I have changed a Galaxy to 7 digit and it is not too hard, but;
- You need to be able to burn the ROM's or know someone who can.
You need access a crimper to make up the extra wire you need to add to the loom.
You need 4 Bally or Stern 7 digit displays which can get expensive.
Another option is to change the settings on the dip-switches to make the game harder - 3 balls and 'conservative' setting (see the manual).
cheers
Ian
