I discovered that I have one of the Tyco frisco auto racks. problem is It doesn't have a rack. So I decided to rebuild it. But I have a few questions. 1. Should I use stryreen I beams for the collums? 2. how much space is there between the first and second levels? 3. What should I use for the floor of the 2nd level? 4. How can I put KD trucks on it? 5. Is the Orange color on it correct? or is it susposed to be a yellow?