The Y Transfer Idler Should be in the 6mm Acrylic box along with all the other 6mm Acrylic Parts. If it’s not there, you’ll need to fill out the Spare parts order form here:
Please collate a list of anything missing as you proceed with the build and add it to the list. Its important that you proceed as far as possible as we only send out one subsequent spare parts order free of charge. There should be nothing to hold up the build as the part can easily be fitted last.