I think the USB port on my transmitter isn't working. It won't connect to any device. Good job I never got around to doing my DBS mod! Maplin in the UK are very good at looking after customers. I should be able to swap it out no problem. Mine is the original A model - should I get another A or a B/C assumingI have a choice? I have never updated the P3 so I don't want to use something that will force me to do that until I am ready.