I work in the Wind industry, and I have found that my Surge + full bit kit are endlessly useful as an EDC.
Years ago I made a holster out of Polymorph, and it worked great. I always planned to design a holster for 3d printing, but I didn't need it until recently when I left it in my car in the hot sun... One plastic puddle and ruined car seat later, I needed a new solution quickly.
Luckily, I was able to easily combine the following Things to make a working holster. It's not perfect, but with a bit of filing in the bit kit holder it works well.
Right now, the bit kit fit is very tight. I plan to adjust the design further, someday.
UPDATE 11-22-20
I have been using my first version for several months, and I haven't had any real problems with it.
I added V3 version. I made some changes to give more strength to the side arms that hold the tool and the ledge that the blade lock buttons clip onto. I think I fixed the need to file the bit kit holder. I also added some material inside the bit driver hole to create more friction to hold it better.
I have not printed V3 yet- no promises.
I added V4 version. It is the same as V3, but with a space for the extra file/saw to the side of the bit kit. I no longer have my file or saw, so this attempt is pretty much a total guess. Let me know if it works.
The author hasn't provided the model origin yet.