I've had two Walthers 90 foot TTs.
The original, which had a better controller. That gave up the ghost a few years ago.
I then purchased the newer DCC version. I've had it installed for about three years.
It use to work until about a year ago. Now it just rotates non-stop, ignoring all the programmed stops. Reprogramming doesn't work. It just rotates, endlessly.
Be warned.
Cheers
Roger T.