Longer LK5 Pro 3D Printer- Full Review 

I have this same printer and it’s been running great. Multiple 41 hour prints that turned out amazing. PLA+ runs the best with this printer I’ve found so far. TPU wasn’t running right until I went to the tractor supply store and found a small rubber o-ring to put around the metal wheel that holds the filament against the gear the drives the filament in. It kept the TPU from slipping. So far I haven’t been able to get carbon fiber nylon to run. It actually broke my hot end which was an easy replacement from amazon.