Ryan, The Extreme shaft is not a great piece of engineering. There are numerous posts regarding issues and poor performance with them. Hate to be the bearer of bad news. The Extreme products are not the best. On a great note if you are looking for some great products to enhance flight choose the Xtreme product line. Our fellow collective members USHobbySupply and Boomtown Hobbies carry these products and they are fantastic to say the least. Many of our regulars around here including myself have fully outfitted our helis with the Xtreme products and love them. Sorry I couldn't be of more help regarding the Extreme core.