[Richard_FM]

I heard the Microdrive was launched when I was still on the bench, and this meant it was rushed into production before Sinclair had been able to run any long term tests. This meant thermal expansion caused the drive to give trouble, something that should have been sorted out long before it was given the go-ahead.

As mentioned above the QL had the potential to be a decent computer but there seemed to be too many compromises in the design.