Something to consider when going whith a metal ceiling is the trus span. if spannig 8' with insulation ,you should use 1.5"rib panels for support(which cost a little more money.I went with the metal ceiling and like it alot.
i was wondering the same thing. ordered the race deck and installed it this past week end in the back of my sprinter van(14'x5').cut around e track so e track is recessed. plan on useing pingle wheel chocks(e track mount). came out great! i'll get pics up later.