The 6-channel DX6i uses the same full-range DSM2™ technology
found in the Spektrum DX7 and includes an impressive list of programming features for helicopters that are simple to access and use. The DX6i is also compatible with all existing Spektrum aircraft receivers. Whatever kind of flying you do, the DX6i can be used for any existing Helicopter that requires 6-channels or less. This is perfect for the Trex 450 RC Helicopter and about half the price of a DX7.Receiver - Spektrum AR6200
Gyro - Futaba GY401 Spec: Align RCE-BL60G 60A Brushless ESC Spec: Spec: NOTE: For use only with FM, PCM and HRS systems. Do not use with AM systems 3 X Servo - Futaba S9650 Spec: Astroflight Blinky lithium cell balancer LiFePO4 A123 Battery Charger - Hobbico Accu-Cycle Elite Battery Cycler Align Trex 500 Helicopter Specifications Flight Time - 7-9 mins It’s a lot more stable than the TREX 450 in a hover and flies similarly to the TREX 600. Even though it’s bigger than the 450 TREX with a flying weight that’s more than twice as much, it’s still only half that of the TREX 600, making it quite susceptible to winds over 10mph.
All in all Not much flying time
The AR6200 DSM2 6-channel receiver is a great solution for any 
helicopter requiring up to six channels. This DuaLink receiver simultaneously gathers information from two receivers that is processed by Spektrum software that combines it to form the most vivid picture of an RF signal. This dual path redundancy, plus the fact each of the two receivers is located in a slightly different location, exposes each to a different RF environment and creates a bulletproof RF link in all conditions. The range would be further than you would ever fly safely. This may seem a little to much bullet proofing but saves you worrying when flying. 
a High Performance, Compact and Lightweight (AVCS) Angular Vector Control System gyro developed for model helicopters. Because the sensor and control circuit are integrated, it is simple to install. This is spot on the money, as close to plug and play as you will get.This is now seen as an "older" type of Gyro although still readily available. It is a simple and robust winner and will be around for some time. 
Highly efficient brushless motor for Align 500 Class RC helicopters, it performs with superior torque and power, with 6S Lipo pack for TREX 500 helicopter, great economical and efficient choice. This motor is maintenance free, high torque, high efficiency, stable and quiet. High-speed ball bearings, powerful magnetic out-runner rotor. These brushless motors are designed with a new radiator system. The motors are built with an integrated cooling fan and has air ingress/egress vents, circulating cool air inside the rotor continuously. The motors efficiently lower operating temperature.
Input voltage:DC11.1V-22.2V 3-6cell Li-Po
Max continuous current: 4S 45A/55A(30sec) 6S 35A/45A(30sec)
Max output power:650W/800W(30sec)
KV value:1600KV
Dimension: spindle 5x36x61.1mm
Weight: 200g (prox.) 
Built-in 5-6V step-less adjustable BEC. This Align line of brushless sensor-less speed controllers is an excellent choice for Align RC 500 helicopters. You can use them with virtually any brushless out-runner or in-runner motor. The Aircraft Locator Option is engaged by turning off the transmitter. When the ESC does not receive a signal from the transmitter for 30 seconds, it will start to send an alarm to the motor. The sound of the alarm will aid the pilot to locate the aircraft.
Continuous current:60Amps with proper air flow
Surge current:70Amps
Supporting motor types:2~10 pole in/out-runner brushless motors.
Supporting maximum RPM:2poles=>190,000rpm;6poles=>63,000rpm
Supporting input voltage:5.5V~25.2V
Supporting battery types: Li-ion/ Li-poly 2~6 cells
Output voltage: 5-6V step-less adjustment
Continuous current 3A; Burst current 5A
Size:65X28X12mm
Weight:55g 
Ideal Tail servo for use on the Align TREX 500. It complements the GY401 gyro perfectly but can of course be used with most other gyros.
Dimensions: 1.4 x 0.6 x 1.1" (36 x 15 x 29mm)
Weight: .92oz (26g)
Torque: 28 oz-in (2.0 kg-cm) at 4.8V
Operating Speed: 0.08 sec/60° at 4.8V
Lead Length: 7.9" (200mm) 
This is a High Torque, High Speed Digital Mini Servo from Futaba. Coreless motor, conventional servo motors have a steel core armature wrapped with wire that spins inside magnets. In a coreless design the armature uses a wire mesh that forms a cup that spins around the outside of a magnet. This arrangement is much lighter, which results in smoother operation and faster response time.
Dimensions: 1.4 x 0.6 x 1.1" (36 x 15 x 29mm)
Weight: .92oz (26g)
SPEED: 0.14 sec/60° @ 4.8V
0.11 sec/60° @ 6.0V
TORQUE: 50 oz-in (3.6 kg/cm) @ 4.8V
63 oz-in (4.5 kg/cm) @ 6.0V 
Very simple to use, the Astro 'Blinky' is PACKED with features to allow SAFE: balancing, charging, and discharging of each cell within your Lithium pack, also use to check voltages of each cell. Use the Astro 'Blinky' to check for low voltages in your pack, checks each cell. Can be used to balance pack while charging (use with any dedicated Lithium Charger). Can also be used to balance the pack after charging to ensure correct voltage of EACH cell within the pack! 
Charges, Discharges and Cycles NiCd, NiMH and Lithium-based battery packs. Perfect for radio batteries, Lithium Park Flyer batteries,plus single cell glow starter cells.
A uniquely designed blade balancer injected from plastics. Defines the 
static and the dynamic balance of the main and tail rotor blades. 3 sizes pins are provided for using with rotor blades with the blade holes from 3mm-6.mm
Length: 850mm
Height: 310mm
Main Blade Length: 425mm
Main Rotor Diameter: 970mm
Tail Rotor Diameter: 200mm
Motor Drive Gear: 12T/13T
Main Drive Gear: 162T
Autorotation Tail Drive Gear: 145T
Tail Drive Gear: 31T
Drive Gear Ratio: 1:13.5:4.68 / 1:12.46:4.68
Weight(w/o power system): 955g
Flying Weight: Approx 1700g
4S, 3,200 mAh
5S, 3,200 mAh
6S, 2,200 mAh
6S, 2,500 mAh
3S x 2, 2,200 mAh
3S x 2, 2,500 mAh 
Price is reasonable
Stable flight characteristic
Part and upgrade options are plenty
85% factory assembled
Align's proven performance
Strong CF frames
