@Ricgt, if the repair kit is for your new Reo (adjustable 510), you do not need any upgrade. There are now two types of repair kits available:
Repair/ugrade kit old style (for the older non adjustable 510 Reos and for the even older Reos, which do not have the gold contacts and the high heat button)
Repair kit adjustable 510
Repair/ugrade kit old style (for the older non adjustable 510 Reos and for the even older Reos, which do not have the gold contacts and the high heat button)
Repair kit adjustable 510