@David-TP I have a mesh network using M9+ as main and satellite and an M5 as a satellite. System wants to update M5 to 1.6.0. Shouldn't I wait for M9+ to get 1.6.0 and upgrade all 3 together so they...

This is a decent answer, but the signal strength can be different between different kinds of devices at similar locations. It’s better to have the Mesh device measure what it perceives the S/N to be...