A tool holder for my Ultimaker original. It's attached securely to the Ultimaker on the right side at the back using one of the Ultimaker's bolts.
This holder fits my most used tools; tweezers, hex key, small pliers, a file, a stanley knife and a small screwdriver. I realise it might not fit your most used tools, but in that case you might be able to adjust the size of the holes.
No support necessary. Print, unscrew the bolt at the back (right side, the middle one) and attach the holder.