I had also different and very unique arms with arm shaped end which looks awesome but does not stand crashes so good, for cinematic are great. This one, is meant to keep same shape and geomtry as its working perfectly but more crash resistent!. Frame generates no vibrations and is responsive as Fire!
Distance between motors forms a perfect Square, so movements are executed pretty well.
I hope to come with more pictures and details about it soon!
Also, I will update and create a thingiverse repository for it. Hope you enjoy it!