Off topic:

My sons are asking me if you are the "Mats Sundin" who played ice hockey in the National Hockey League here in the U.S.?

On topic:??

I use several different 9-16 V to 5 V converters and USB A distribution blocks with USB A to USB "x" type cords often with 90 degree plugs to easily fit in small cramped spaces with bending cables.??

I tend to avoid using RPi shields for power alone, preferring to make the header available for other functions as needed.

The other benefit of this approach is that my backup power can all be 12-15 V with most of it consisting of LiFePo4 batteries between 12.8-14.6 V.? This greatly simplifies things.

Thanks!

Get On The Air!?