I know this posting should probably go in the COLA cars sold seperately posts. I recieved my four car kits and assembled them. Too bad I did not act sooner or I could have had both sleepers. There are TWO types of trucks now. "Clip On" for the newly tooled cars and the screw on type for cars usuing the old smoothside tooling.The cars come completely assembled,all that is needed is to attach the trucks,once I figured out that there were two types,snap and screw I was able to match them to the various cars.I hope that the snap on trucks prove durable in use as the part where they snap on to the raised bolster looks very thin and delicate. The Obs car comes with a couplerless rear truck,and no trip pins(which I don't use anyway)are included. You get the standard plastic storage boxes,but with no liner. I have determined I can print in color on thin cardboard a copy of the cardboard liners from smoothside car boxes,then fold them so my boxes lined with bubble wrap will look more delux. Nate Goodman (Nato).