Here's a download link for the front rotor that was first fitted onto @EpicSpaceTroll139's bigger heli. He did modify the rotor to suit his heli better, so its performance is different.
And thanks for inventing the tiny bearing @Majorjim!
I have also encountered the same problem. When flying forward with a heli, the rotor's front area seems to produce more lift than the rear when you view it with F12 in flight. Maybe this could pull the antenna out of the thermotube. I wonder if this could be compensated by bending the rotor's blade tips down, so that rear would create more lift and front less when the rotor is tilted and moving forward?
One thing i noticed to help with the problem is to clip several antennas together into the same thermometer tube instead of just using 1 antenna in the bearing.
