Hi, I recently bought some Polyalchemy Elixir PLA, it is a beautiful filament, but I am having issues with extrusion when using it. It seems to print fine for about an hour, then seriously under-extrudes, causing print failures. I am running a modified Ender 3 on a bowden set up, with a genuine V6 and a 0.4mm nozzle. I have tried higher and lower temperatures and speeds, and upping / lowering the extrusion multiplier. I was initially getting skipped steps on the extruder stepper motor and it was grinding the filament, I adjusted extruder tension with no improvement, so I replaced the stock extruder with a genuine Titan. I have also replaced the bowden with Capricorn XS. Nothing I have tried has cured this problem. I can print other PLAs and PETG with no extrusion issues, I am only having this problem with this particular filament. Has anyone else had these problems and can suggest what to try next? Thanks in anticipation.