This is a great little upgrade kit at a pretty decent price per kit. Upgrading is easy if you follow the many online guides available. Feathers (Installation Difficulty: Low) The feathers are very strong and have worked well on my recent prints. I seem to have made 5 prints and they are still as clean as when they were aligned. Biggest improvement over stock springs. Metal Extruder (Install Difficulty: Low): The metal extruder is awesome too. It really snaps onto that thread and can easily pull it with good force no matter where your spool is. Was very impressed with its smoothness and relatively easy installation. Finally tubes. Very straight forward and a nice twist. I didn't have any limitations with the standard tube but heard it was highly recommended so I added it. The simplest of the reliability mods. Highly recommended
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