Flexible Standoffs for Soft Mounting Flight Controller

I previously tried soft mounting one of my flight controllers with standard plastic standoffs and o-rings to get rid of some yaw shake that could not be tuned out. It didn't seem to help so I decided to try printing some in HobbyKing flexible filament (NinjaFlex is too soft) and it took care of my yaw shake. I also used slices of silcone fuel tubing instead of o-rings since it is softer. They are not threaded but the holes are small and flexible enough that m3 screws easily thread into them.