My suggestion to anyone using CW-80 with MTH should cease immediately. I have gone through 3. Thinking it wasn't the transformer is wrong.
The last transformer I was using just power a test track. I powered the track to do the sound set upgrade and a coil on the board over heated. And the transformer ceased working.
I have a chance to buy a MRC transformer to replace the Lionel CW-80. Whats anybodies opinion? For a test track and to do updates with the computer I do not want to spend the money for another Z-4000.