Quadcopter Tie Down Bracket

These were designed to work with another item here on thinaverse -
"DJI F450 F550 Flamewheel Long Leg Extensions - 5mm Thick"

They are used to attach your quadcopter to an engine "runup" pad so it doesn't take off while undergoing testing or maintenance. No more dings in the ceiling. Print 4 of these, attached them to something heavier than your quad can lift, insert a nail in each one to connect the quad to the "runup" pad, and then test to your hearts content knowing the beast will not