I explained why I want to pre-assemble most of the vehicle. I need to sort out ride height, and fit larger and/or wider tires. I need to see what changes I have to make to the interior tub in order to get those tires to fit. I have to see what modifications I have to make to fit a larger motor. And things like that.

A second kit wouldn't solve this. A second kit would only give me spares if I screw something up.