We have sold the 586220 Diagnostic Cartridge for many years and there has always been other sellers with the harness, but sadly those sellers are no longer trading and others are selling the harness for over $80, so we are now making them. The PCBs for the user port have now arrived and the harnesses are on the way from China. Hopefully a great way to get the Diagnostic cartridge, Harness with user port cartridge, full printed manual all for under £50! Updated 1st January 2025