@Marten@Stairport I managed to get the LF2 jetway working. I noticed in your aircraft.xls file that you had the author of the a350 set to "FlightFactor and QPAC." In the a350's .acf file the author is now listed as "FlightFactor and ToLiss." once I changed that in your xls file the jetway worked.
There maybe another potential problem, in order to get JD's ground handling plugin to work with the A350, the name of the ground handling set has to match what's in the aircraft's description in the acf. That is blank in the A350's acf, so a user has to edit it. Once I put something in the aircraft's description, the LF2 jetway stopped working. I gather that the SAM plugin has to match three things for it to fully work, the acf name, the author, and the description. Can you do away with the SAM plugin's requirement to match the description?
Strange, though, that the LF1 jetway always works.