Are you just selling the hardware kit, or are you offering a drive in/out service.
As a TB kit is nothing more than the the parts needed put in the same box, you could just go out and get the parts you need now. BUt a kit does make life easier and i buy mine in kit form bar sensors.
I think it should sell well, just as we all know people say they are interested now and drop out 5 mins before the end. My hit rate is so low.
GOOD LUCK DOOD, ill ave one off you!