Hi P33dro - OK ! I finally got it. I had not been able to understand how to patch the TTHome properly, what you pointed out has put me on the right track - the ttgo.bif has to contain the current application version number in order to download the correct file under TTHome - that all works now, THANKS VERY MUCH !

Running 8.560_348422 - Maps 860.3101 and presuming I should be able to use the ALG etc now.

On another note I am using Bootloader 5.5130, someone mentioned this may not be the best for a ONE v1 ? Any ideas

Thanks again.