Do the helicopter servos respond accurately and quickly to the transmitter? Mine was very hard to control. Turned out that the for/aft cyclic trim/control lever on the transmitter was slow to respond and eventually stopped working completely. The front servo moved very slowly. (The servo worked ok on another channel) A new receiver appeared to fix it, but the problem came back again. Eventually Helimax did replace the transmitter. The next flight was great. However, as soon as I touched the tail rotor trim, the tail motor lost control. The new transmitter had the same problem as the original transmitter only on a different channel. Switching between the two transmitters, I can get each function of the helicopter to work properly. I just can't get all functions to work with only one transmitter. At that point, Helimax didn't want to believe they sent a defective transmitter. Emails went unanswered. I gave up on getting a response form them. That's why my Axe CP now has an Airtronics radio in it. (It still needs tuning to fly well) Outside of replacement parts, I do not plan to buy another helicopter from Helimax. P.S. I always liked Airtronics radios for aircraft but I understand the Axe receiver matches Futaba. The 3 in 1 would not arm for the Airtronics. Therefore, I wound up replacing it with two separate ESC's and a gyro.