Compared to the referred entry, on Nilanga's suggestions, I made a cut on the central sieve hole, and plotted the dp spectrum to show the intrinsic resolution. Still, two runs in comparison: #2853, standard LHRS setting, pure LHe in target #2854, Q3 current scaled down, pure LHe in target The dp resolution looks not getting worse.
In addition, I made a cut on VertexZ to choose 1cm vz, and another cut on central sieve hole, then plotted 1D tg_th and tg_ph to see the intrinsic resolutions.
#2853 dp (central hole)
#2854 dp (central hole)
#2853 central hole tg_th (vz cut)
#2853 central hole tg_ph (vz cut)
#2854 central hole tg_th (vz cut)
#2854 central hole tg_ph (vz cut)