I have a memory of Tony saying they did it at about the same time. I can’t remember if this was from chatting to him at Longridge or from an interview in the mags.Thanks for digging out the guide! I guess that means Dave either did it around 85/86 but didn't publicise it, or did it around 87/88 and there wasn't time to get it in to the guide.
I've dropped Phil Kelly a message to see if he can shed any more light on it.