I heard Radio Havana announce last night that they'll be running on 5040 in SS and EE for the rest of the winter.
I checked 5040 against Radio Rebelde on 5025 last night. Rebelde was good 2-3 S units better than RH on 5040.
My guess is I'm off beam for 5040, but it could be the transmitter sites. Cuba isn't very wide, but that island is long.