Hi, and thanks for the quick response. The bloke I bought from said it was original, but as I wouldn't know him from Adam, who knows! It has a sticker on the bottom with mac beginning 00:09:34:.... and a hologram which chnages colour and says dream on in the centre (a few lines). Will end up looking inside so will get more of a clue.
I will send the motor to zero with my Vu and then unplug that and connect DM500s. Assume I can send to Thor via tbe rotor setup menu? So far, it hasn't budged a degree. I've sent silverfox to the box, and some other bouquets - no real joy though. Not sure about sensitivity as the DM500s seems to get a better signal from the fixed sly dish wheras the sly box and Vu get a better signal from the motorised dish.
My new project - already go me hooked!