An alternative and one of my favorite Spektrum compatible receivers is the REDCON CM421 2.4G 4CH Full-Range DSM2
This is a 4 channel full range DSM2 compatible with all your Spektrum Tx
Compatibility (Spektrum,JR,DSM2): DX6I,DX7,DX8,DSX7,DSX9 DSX11
the RedCon offers a fail-safe system, and its weight is at sub 3 grams. Channel leads facing outward which makes it ideal to fit in smaller hatches such as the UltraLight FireFly. An affordable micro receiver at around $11

Brand Name: REDCON
Item Name: CM421 receiver
Band:  2.4GHz
Channel: 4CH
Modulation: DSM2
Dimensions (L xWx H): 29x16x7mm
Weight: 3g
Voltage Range: 3.6-10v
Antenna Length Main RX: 29mm

Key Features:
Preset failsafe system
Compatibility (Spektrum,JR,DSM2): DX6I,DX7,DX8,DSX7,DSX9 DSX11

Binding Procedure:
– Put the binding harness into the Channel marked BIND.  Next apply power to the receiver.  Receiver’s  LED should illuminate.
– To set fail-safe throttle and control surface positions, (minimum throttle and all control surfaces set to neutral is suggested). Press and hold the bind button of transmitter (LED will illuminate), Turn on the transmitter.
– Receiver LED will change from rapid flashing to slow flashing and a few seconds later when bind is accomplished the LED of receiver will illuminate solid. All fail-safes should be programed correctly now.
– Remove binding harness from the BIND channel.  Restart the receiver by cycling it power off and turn on.  All channels should function properly now.  You may test fail-safe by holding sticks in corner, cycle transmitter on and off.  Surfaces and throttle should return to your preset fail-safe positions.