Hello

Train/track was David Sirett's suggestion and I did invite him to post it but he seems to be "unavailable" at present (so credit to him in part)
"Interface" is mine as it is not necessarily the entire control system that is kaput.

So I've taken the liberty of posting half a suggestion from someone else and half mine so that the asker has this final combined suggestion up in the list of suggestions.
I hope everyone is okay with this.