CPS 2500 Nozzle Selector Repair

This was originally part of the CPS 2050 modification in the Backstage section, where one part of it involved doing a more permanent fix of giving the nozzle selector a more robust
fitting, as well as being able to take it off and on without having any screw thread wearing problems again. However it wasn't in the Fix Up section, until now, so if you find this here first, you can go straight to it here.