contains following MRs: https://gitlab.cern.ch/atlas/athena/-/merge_requests/35337 (fix lhe-only production) https://gitlab.cern.ch/atlas/athena/-/merge_requests/35338 (Allow for Single Particle Guns setups with unstable particles ) https://gitlab.cern.ch/atlas/athena/-/merge_requests/35413 (allow for negative x-section in Rivet) https://gitlab.cern.ch/atlas/athena/-/merge_requests/35430 (Fixing MG5_aMC NLO Gridpack Systematics) https://gitlab.cern.ch/atlas/athena/-/merge_requests/35491 (Fix for Pythia8 UserHook to enable decay to SUEP ) https://gitlab.cern.ch/atlas/athena/-/merge_requests/35524(MadGraphControl SUSY: Allowing multiple input LHE files ) https://gitlab.cern.ch/atlas/athena/-/merge_requests/35791 (update to MG2.7.3) https://gitlab.cern.ch/atlas/athena/-/merge_requests/35805 (Update log file diff in post.sh )