I JUST INSTALLED ONE OF THOSE EXTREME CORE UPGRADES FROM BLADECX2.COM AND I'M HAVING THE SAME PROBLEMS. I'M TAKING IT OFF AND SENDING BACK WETHER I GET A REFUND OR NOT. THIS IS THE SECOND TIME I BUY FROM THE CANADIAN. THE FIRST TIME I GOT SO FUSTRATED I SOLD THE HELI. THIS TIME I'M THINKING ABOUT IT TOO. BOOMTOWNHOBBIES, EXPECT A PURCHASE FROM ME SOON.