Thanks for the positive comments, guys. I didn't see your responses until today.
@Pete68 Lee, Converting the gasoline tanker to a chemical tanker shouldn't be "too" hard. Still need to finish the track for the Big Boy. Been putting that off for too long.
@DRIPTROIT 71 Brain, yes, the Mack builds up quite nicely. The tank trailer was another matter altogether! I seem to have trouble with tank trailers for some reason.