None of these instructions make any sense.  There is no place to put your backer number or your car types.  I've already paid and shouldn't have to pay additionally.  There is no way to tell what to click on and even what has a link.  It looks like a scam as it doesn't use the kickstarter platform.  I've tried it on two different computers and neither one shows the options clearly.  You need to start this over with much better instructions.  What you have now is worthless.  I cannot complete anything!