assembled lots of microtrains couplers 1015 and 2003... unfortunately installing 2003 in a ac4400 is a bit on the tricky side. i sent an email to microtrains to ask for help. i will post the reply here.
an aristo gp40 was disassembled and got a coat of primer. frame, underbody and trucks are already black. the body will soon be painted. can't do that today cos the air compressor is simply too loud to run it on a sunday....