I had a breakthrough on the mail room in the M70B. I was trying to solve the dilemma of the letter holes and I think I just got it. The sorting table was built up with the pigeon holes just being a blank wall, and then I used the Plastruct chain link fence kit to make it look like rectangular pockets. I will probably do a black wash in each cell to give it some depth after I paint the rest of the car. I also added those bulkheads at the end of the car to hide some steel nuts I used as car weights.