Why do some WPC95 driver boards have diodes fitted in d25-32 and some have 0 ohm resistors? Are some of the driver boards only compatible with certain games (similar to how pre-fliptronic WPC89 PDB's work with all WPC89 games but post-fliptronic don't work with pre-fliptronic games). Is it only a matter of fitting them with diodes or 0 ohm resistors/jumpers to make them compatible with all WPC95 games?