Hi, Long time watcher, first time poster here. I'm building one of these right now and I wanted to share a couple solutions I came up with for the leds and meter mounting.
For the leds I got some small rubber grommets. I believe they are 3/16" id and 1/4" od and jammed them in all the helper panel led holes. I then used a bit of insulation from some Mogami W2528 cable I had. I just slide a piece of it over the wires to the led and it gives me a nice firm fit with the grommet. Holds well but easy to put in and take out. I'm sure you'd have to experiment with whatever you could get for grommets. Find some insulation that fits well or just build up heat shrink tube until it fits right. I've done that more than once.
https://www.dropbox.com/s/536iqlqax1rc9of/2017-07-21%2002.02.53.jpg?dl=0
https://www.dropbox.com/s/aefdblpqh1pnqzd/2017-07-21%2002.04.42.jpg?dl=0
As for the meters I took my cues from previous posts and fabbed up some little brass flanges. Fortunately I had a 3M - .50 tap handy so I could use regular case screws. The little plastic bits that came with the meters made handy spacers so I could use regular screws while providing a little extra protection for the meter backs.
https://www.dropbox.com/s/rxay0rvl1s46hhh/2017-07-21%2002.05.06.jpg?dl=0
I've got 16 channels running well and hopefully will finish in the next couple weeks. I've taken it down to my studio a couple times to hear it in it's intended environment. It sounds amazing! So much better than our old Neotek IIIc that will be leaving soon. All the other engineers I've demo'd it for have been floored and are bugging me to get it finished so they can use it. Really nice design.
- M