I'll post a finished picture later.

A very cool concept. However, Da Vinci had a problem with his design. After the shot, the arm hits the ground and the projectile socket breaks. There should be a stopper there to prevent such damage.
@VojtechStroka_549101 Very ingenious to add a stop break to the design. Bravo!
Great Stand. On certain instruments I had to print at 102% for a better fit.
@CupertinoGeek_578063 Yeah, I know that you must measure then print for correct size. (First lesson with strange models).