It turned out okay I guess. Top one here:
Scissors, metal file/saw, hook, phillips driver, small blade. Pairs with this other custom SAK which has main blade, combo tool, wood saw, corkscrew, awl, and mini screwdriver. Basically I have a complete tool set with two SAKs that each have two layers. It's easier in the pocket than carrying a 4 or 5 layer SAK, and they're easier in the hand as well.
Here it is paired with a custom Juice:
The only duplicated tool is the phillips driver. There's one phillips on the Juice and another one on the SAK. I can live with that.
Side by side size comparison of the custom Juice and custom SAK:
I tried getting a clear shot of how the file and the small fit together on the blade layer, but it was really hard and I'm already bad at taking picture. This was the best shot I could get:
It's a very tight fit. I had to fiddle with it for a long time before I could get it to the point that the file was not touching the spine of the small blade when closing. It wasn't actually really a problem, but it just bothered me because I could feel it happening and it was annoying. It wasn't causing any damage to the blade or anything.
I finally did manage to get it to the point that nothing is touching, but it took a lot of very careful adjustments. I think the normal way to do this might have been to use double liners or double spacers or maybe both... but I didn't want to do it that way.