I have no experience with this device, but I have a DIP, and I think it is worthwhile. How good were the instructions ? It's one thing to select the correct frequency, but to know how/where to insert it is another. BTW I am a EE and I can read circuit diagrams, but I would not be able to figure out for myself how to attach the crystal to my particular player.
I wonder if you could install the mod in the DIP .. that way it would be portable to other transports.
I wonder if you could install the mod in the DIP .. that way it would be portable to other transports.