I liked the original tool holder because it slides into the extrusion. However the lack of allen tool slots was not working. I rearranged this a bit and added the remaining tools to it. This does cause a max print height issue so if you frequently print at the top of the printers capacity you might want to look for something else. But for folks printing shorter things primarily this works fine. Its also easy to slide in and out if you need to print one off tall items.
This is designed to be pretty snug on the allen wrenches. I don't like them giggling and making noise which I had with other tool holders in the past. If your printer is not very accurate you may find they don't fit. as I said they are snug you have to push and pull them in and out for the most part.
You will need to stand this up on end so the allen holes are on the bottom and the cutter holder is up at the top. This worked well for me with support. I didn't try it flat but the extrusion slots would need support and it looked like it would be harder to clean up than printing it tall. Feel free to do what works for you.
For support, print from bed only, not everywhere.
I used Tinker Cad and butchered the original model the best i could. I am no CAD expert and tinkercad is accessible.