The boards of a CMD FD-4000 and a CMD FD-2000

A FD-4000 drive (note that the FD-4000 DOS sticker is missing)

A FD-2000 drive

In a discussion at  http://www.commodore128.org/index.php?topic=4581.msg22353;topicseen#msg22353 , RCTech talks about how he modded a FD-2000 to be that of a FD-4000.  Above are photos of the top sides of the boards from my drives. The FD-4000 has a clock chip that sits under the FD-4000 DOS chip; the FD-2000 has no clock chip.

Truly,
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug
July 27-28 Commodore Vegas Expo v9 -
http://www.portcommodore.com/commvex