Step 2Prepping the Backpack
Figure out where you want the specific components to be on the bag, and how it will operate "out there", on the road. This should determine the physical arrangement of your own particular build. Cut/sew/modify anything if necessary - see the previous step on why my bag looks so lop-sided.
The Xacto blade and lighter are useful for making cuts and melting frayed ends, and good old-fashioned needle and thread are gonna be your best option for re-attaching.
It was just by luck that the project box I found is perfectly sized so that it slides right into a side pocket with a convenient headphone cord outlet hole, close to the shoulder strap I will be using.
I put all the controls (except the main switch) on the shoulder strap, and I wanted to run wires up through the strap itself, so I had to cut tiny holes on either side and feed the them through with a piece of wire hanger, like a giant "needle"... but more on that later.
There was also a nice section of webbing on the exterior of the strap itself, which was perfect for a home for the LED/pushbutton assemblies, and I had a big plastic ring in which to embed another switch. Obviously, these details will be different for everybody.
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