Thanks for responding so quickly. Also, between the two movies did the ion arm change? I am new to prop building, and I have seen different model ion arms for sale and I would like to make sure I get the correct one.
The brass clippard elbow is square and located on the ion arm cap for the GB1. On the GB2 pack it’s hexagonal and located behind the ion cap on the arm itself. Several of the screws throughout the pack are different as well
Amezing work… I want to be your child 
Made some corrections to the pack. Fixed the ribbon cable, changed a couple of the labels, did a little weathering and shortened the Alice frame spacers to 1/2”.
Here is a side by side comparison to my full scale hero pack. Considering it was probably a tenth of the cost, I think it stands up pretty well.
I know it might be a rudimentary question, but I see that you’re using the same battery that I have on my pack. With the integrated power switch on the battery, do you have to remove the motherboard each time you want to turn it on? Is there a way to install an external switch? Or do you just leave it on and haven’t noticed any major draw?
Incredible build.