Nut holder for the actuator accumulator replacement

I helped my brother change his actuator accumulator a few weeks ago. The PDF from Toyota shows an unobtanium nut spinner. We got it started with a magnet but almost dropped it a few times. Well a little tinkercad and 3d printing later and here's the results. Maybe a dealer mechanic will show me what it looks like.

 

I made is smaller and good thing because the blue one wouldn't fit. My brother used it yesterday. He spun the knob holding the nut with a long screwdriver. Here's some pics and a link to the design.
3D design smaller 10mm nut holder toyota brake actuator | Tinkercad

now if the linear valve offset was learned correctly it would be a total success but that's for a different post.