Re: Amstrad moved 3.5 inches ?
"the contract required Matsushita (or whoever) to keep manufacturing the drives long after they'd have done otherwise."
Matshita was making all kinds of formats, but the 3" one was unique to them/sony and pretty much to Japan+Amstrad. My Sanyo MBC-550 had an option for them that I'm glad I never took (a WHOLE 256 KILObytes of ram!)