I've been running an LRP Flow for the longest time ever since its release. Blinky and mod once or twice. I havent had any issues with any of my LRP speeods but I have heard of others blowing them up like you so knock on wood. I guess you were unlucky and got one of the bad ones sorry to say.
If I were to use another speedo, it would be Orca. I actually have one for mod. I didn't like Orion or Hobbywing, they feel too flat in blinky.