Nerf Dueling Trees/Flip Targets

if you've watched top shot and seen those dueling trees, and drooled like mad but you can't play with them cuz you're in a place like Singapore which bans firearms, fret not!
Here's a live demonstration:
http://youtu.be/rc8bZGAWSxc
These targets are meant to be in two different colours on both sides, and two competitors will shoot to flip targets to their colour within a time limit.
These targets are designed for stock nerf blasters. I tested them with modified nerf blasters, they shouldn't break apart but they may be so powerful that the target may bounce back after being shot. I'm going to do more testing and some modification to acommodate for that.
Meanwhile, these targets sport a mesh design to make it faster to print, and also to make the targets less susceptible to wind. I assemble all 3 components, putting them together using superglue to glue the base to the two ends of the holders after inserting the target. For now, I superglue this to a post or pole which I inclin