I run the Plasti-Blades as well and had the problem of breaking tail booms. Well, one tail boom. After that boom strike, I decided to find a boom that could take a beating.

I looked around my workshop and noticed that I had a couple feet of titanium tubing left over from an aquarium chiller project. The diameter was too large to use directly, but it was super light, so I slipped it over the new tail boom when I replaced it.

Now, the blades just bounce off of it. Excellent!!

Karl