3-5 business days to flash/code and bench test and ship tcu out. Each TCU is stress tested for 24hrs on the bench to make sure they function correctly before shipping but sometimes they get damaged in shipping due to g-forces when the package is thrown around by careless usps workers and also cores are almost 20 years old so electronic failure is possible.
International shipping times vary. Customs, USPS can hold up international packages and not arrive in the time that is listed USPS claims for delivery time frame. It is out of our control.