I Let it run 3 hours non stop and the thing just keeped chuging along around and around and around full speed pulling 1 dummy Santa Fe engine and 12 cars! Flawless! never derailed! Finally after busting my @ss working on the track forever working and fixing the derailing spots! now the new question comes, is it worth buying a new CW44? I Want one that is the Orange and Dark Green BNSF loco. Dang I Guess all the 12 wheeler locos are hard to run right. Does anybody have tips for me? Advice?