I am running a Tor relay for 6 Months now.
The first 3 months it was easy for me to get the Guard flag.
But since then (3 months) (I didn't change the configuartion) only moria1 is voting for Guard. (Guard probability 0%)
I have 1 MB/s bandwidth advertised, I got Fast HSDir Running Stable V2Dir Valid Flags and I am running for ~60 days straight.
Are there new requirements to be a Guard?