For the Upgrades.ini and Spinner.gen, you don't have to take care for the Instance Names of the Grafics gen file. To get the Changes of Upgrades visible in the Showroom, create own Instances with another Name for it in the Spinner gen and link these in the Upgrades.ini. You don't have to use SLOT... there. The linked Instances in the Upgrades.ini don't have to match the Instance Names in the Grafics gen file. They only have to match the Instance Names in the Spinner gen, to get it working properly in the Showroom and on Track.