No, you can't use different cyrstals in the receiver. You have to use the crystals from the same manufacturer. But it's as simple matter of changing the wiring in the servos to work with your receiver. Refer to the attached diagram to change the wiring. If you are referring to the "spines" on the top of the airtronics plugs being in the way from plugging into your JR wires, simply use a hobby knive to cut them off smooth with the plug. Then they will plug into your JR plug.

Ken