ZMR250 Orientation stick

I have a hard time telling the front from the back of my quads. They all look the same to me while in the air. I usually fasten a ball to the front of the quad to help with the orientation.

I have designed a few parts that can be combined to form an "orientation device", You need some M3 screws and some kind of tube to complete the set. The tube should be around 3,5 mm wide. I made mine by shrinking several shrink tube lengths on to of each other and putting them in a soda straw. The soda s