Exactamento! I was going to suggest the same thing. Beats tiring out your arm trying to hold the TX in alignment with the IR, and lets you post something on CB while the update is runningWhen I was updating back last December or August 2019 I saw something that was saying keep the first 2 digits of the version the same, so "M.m.p.b" the M.m. needed to be the same where the .p.b was a 'little' more flexible.
When I was updating 24 packs & 8 Handhelds, I setup a jig to update 2 units at once, then I just swapped back and forth between the jig updating 1 pack at a time.
The time it took me to remove batteries from freshly updated pack, install batteries and power next pack on, and set it in the jig took the amount of time for the pack already on the jig to update.
My receivers are in a wall mount rack, so for my jig, I setup 2 mic stands with handheld clips and balanced the packs on the clips. The entire process from setup to tear down took me like 20min.
It took longer for me to read and double check that I had the proper firmware to update and read most of the release notes.
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