I put mine together in Dec. for latter use as a scale project. The heli is very smooth with out bearing upgrades so you can always do it latter if you feel the need for it. For basic hovering and flying you will not be able to tell the difference. The only places that I see it needing bearing upgrades would be the washout arms and mixing arms if you decide to push the heli in to more aerobatics. I also did not like the z bends and will change them out to ball links one day when I have time. Also remember to lubricate the start shaft when assembling, I forgot to do it on mine at first and it made an awful sound.