Thanks guys!
I'll look into making this available...
...and also in a higher version. The nice thing is that, being 3D printed, it's easy to make customized pieces without adding much to the costs of the final product. So a +8 or +10mm version, or one with the mount supporting the wing further back is very easy to do!
As for not using the existing 210 mounts: There is not much beef there to hold screws in, so if you even manage to get holes in there for M3 screws the wing mounts will likely damage soon around the screw holes (elongated holes or even tearing/breaking apart). This also gives the opportunity to make better support for the wing (with big flat areas around the screw holes)