Sinclair has come up with an upgrade path for Spectrum owners, to the surprise of some of its staff. But the cost of the upgrade is the difference between a new Spectrum and a new Spectrum Plus, unless you fancy yourself with a soldering iron. The kit costs £30 and the upgrade service £50. It may pay you in the long run to make the change one way or the other - Sinclair says that future software and add-ons will be designed with the Plus in mind. Sinclair is advertising the upgrade widely. "That must be why we're getting people's machines in," said a Sinclair livewire as realisation dawned. See Quit (page 48) for a full explanation of the upgrade.