My fixing patch came stripped out of the box too! After the flybar ball linkages broke after the main blades made their first brush with the ground due to it tipping over during its inaugural flight, i ordered the metal head upgrade and wanted to check the main shaft for straightness as the heli vibrated a lot during its initial power up. I went to take the main shaft off only to find the set screw on the main axis patch to be totally stripped. No allen key i have or any other type of star head or anything will fit and i do not have a drill or taps for that matter on hand (I'm a college student). After all the 3ch syma, 4ch blade msr, and simulator work, I was so excited to fly this heli. But now before a single flight this heli is seemingly grounded for good as I have exhausted my funds to buy the heli, the metal head upgrade immediately after, along with new blades, and now the main axis patch is totally stripped meaning I need a new main shaft clearly. Bad experience all around so far, I have owned this heli for only 4 days