Hi, firstly many thanks for your help with this issue.
I have downloaded your latest Benf 3 app and copied this and your hex version of LIB 3.53, posted earlier, but sadly the outcome was just as before, both appear as RDY but the nano still reboots into the existing V2.60
Sorry I can’t offer any constructive input but software isn’t my department, I would just like the nano to be as good (as far as the spec allows) as my quad is since installing 2.53 and Benf 3.64 looks very good
Thanks again