Mini a complete failure
I assembled the mini last weekend. Ran the test filament they give with the printer. Printed Benchy just fine. figured the printer was good to go. I switched to a roll of prusament galaxie silver and tried printing the lamb. Print failure under extrusions and clicking extruder. I then removed the filament and used the galaxie black supplied with the printer. I was able to print the tree frog so thought issue was resolved after adjusting the print head as others have stated. I then tried the lamb again with the same galaxie black but it had several layers of underextrusion after increasing the flow to 100%. I thought it might have been ok so switched to the silver once again and started printing a part we made. There were several layers of underextrusion as failure with the infill. Again I had changed the flow rate to 100% for this print.
Today I decided to replace the PTFE tube and readjust the height of the extruder. After the printer completed the wipe and went to print the filament jammed in the nozzle on retraction. I am thinking there is something very wrong with this machine. The test data sheet showed build date of 9/6/2019. My reprap guru prints far better than this.