[westyrc]

We have had a scaffold rostrum for 18 months and have had no issues.
I think there was a lot of generators quite close to the track which has potential to cause issues.
I have also had the esprit 4 and had range issues, schumacher replaced the handset and no issues since. It was under warranty with receipt.
I since sold it wish I hadn't and now bought a new one.
The other thing I would say is damp causes issues so keep it and the car on a dry place not the garage if it's not heated. Also might have been worth trying to dry the receiver also just incase it's not the tranny.
I will report if I find any other possibilities. I'm wondering if running a speaker wire past the rostrum could cause the issue but I do doubt it, after a damp day I'm more inclined to think it was that.
Cheers Paul