Flash tilt insert for B.I.G. Helios kombi schirmhalter

I have bought head for photographic flash umbrella which works fine, but has one big construction error.

The umbrella stake hole in the head is parallel with the flash reflector direction. As the reflector is usually located on the highest place of the flash unit, it is off umbrella axis so the flash is not shining uniformly to the umbrella. The solution is to tilt the flash unit so, that the reflector is shining to the center of umbrella.

So I created semiparametric SDAD file for the ti