EWL
I work with native Amadeus which is more like Taarsan was than either Qantam or Qube. Availability is not hosted in Qube it is from Amadeus. All pnrs have a mirror pnr created in Qube which is where the departure control system gets its info from. This is only until the new dcs system is implemented.
LDP is only used for domestic flights at this time, which is why there is still a little bit of USAS around.