I can add in that I tried the BIQU PLA-HR in the AMS on the X1C today so I could print the support interface with Support for PLA/PETG and it jammed on the first retraction. I am either going to go with a single filament for support/interface/print body and use the “TPU-style” top load option or print it on the H2D with the support filament loaded into the second nozzle. Likely the H2D is the right tool for this particular print.